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Kosmos
Astronomia Astrofizyka
Inne

Kultura
Sztuka dawna i współczesna, muzea i kolekcje

Metoda
Metodologia nauk, Matematyka, Filozofia, Miary i wagi, Pomiary

Materia
Substancje, reakcje, energia
Fizyka, chemia i inżynieria materiałowa

Człowiek
Antropologia kulturowa Socjologia Psychologia Zdrowie i medycyna

Wizje
Przewidywania Kosmologia Religie Ideologia Polityka

Ziemia
Geologia, geofizyka, geochemia, środowisko przyrodnicze

Życie
Biologia, biologia molekularna i genetyka

Cyberprzestrzeń
Technologia cyberprzestrzeni, cyberkultura, media i komunikacja

Działalność
Wiadomości | Gospodarka, biznes, zarządzanie, ekonomia

Technologie
Budownictwo, energetyka, transport, wytwarzanie, technologie informacyjne

Journal of Physics: Conference Series (JPCS)

Here we report the effect of Zn doping in NiO, in thin film form. Thin film with the composition Ni
0.98 Zn 0.02 O has been prepared on [001] oriented Al 2 O 3 substrate using pulsed laser deposition
technique. X-ray diffraction, SEM, and magnetic measurements were performed to investigate the
properties of this material. XRD study revealed oriented growth of the film along the [111]
direction. To characterize the magnetic behavior of the film, magnetization vs temperature (M-T) and
magnetization vs field (M-H) measurements were performed. Anomalous behavior in M-T measurement has
been observed in the low temperature region. At the temperature ~ 70 K, Zn doped NiO thin film is
showing antiferro to ferro type of transition. This is in contrast to the pure NiO, which remains
antiferromagnetic at low temperatures. Observation of isothermal magnetization hysteresis behavior
with finite moment confirms ferromagnetism in Zn doped NiO at low tempe...

http://iopscience.iop.org/1742-6596/534/1/012025 2014/09/26 - 12:09

The functionalization of the molecular surface of various dendrimer generations with a phosphorous
core and external amine groups is obtained by converting those amine groups into the corresponding
imines of salicylaldehyde creating multiple coordination sites for the iron atoms. Treatment with
iron(III) chloride yields multinuclear iron(III) complexes on a dendrimeric basis.The obtained
multinuclear molecular systems exhibit extremely high total spin values. The influence of the
generation growth on this type of coordination compounds is investigated by Mössbauer spectroscopy
and SQUID magnetometry.

http://iopscience.iop.org/1742-6596/534/1/012002 2014/09/26 - 12:09

In the present paper effect of hot carriers due to parametrically interacting electron- longitudinal
optical phonons in polar semiconductor is analytically investigated. Presence of hot carriers is
found to significantly modify the threshold and amplification characteristics in the presence of
external magnetic fields. Expressions for threshold pump field required for the onset of polaron
induced parametric interaction and amplification characteristics are explicitly derived. It is found
that at moderate magnetic field and high carrier concentrations hot carriers affect threshold and
amplification characteristics strongly. Resonance between polaron frequency and plasma frequency is
found to be favourable for the minimum threshold field. Presence of hot carriers and magnetic field
along with mass modulation effects are found to be additive and resulted into increment in the
parametric gain. Typical dependence of parametric gain on magnetic field and carrier concentration
could be...

http://iopscience.iop.org/1742-6596/534/1/012052 2014/09/26 - 12:09

Extended X-ray absorption fine structure (EXAFS) spectra have been studied at the K-edge of copper
in some of its biologically important complexes, viz., [Cu(BzImH) 4 X 2 ] and [Cu(BzIm) 2 ], where
X= Cl, Br, 1/2SO 4 , ClO 4 , NO 3 , and BzIm = Benzimidazolato anion. The spectra have been recorded
using a bent crystal 0.4 m Cauchois-type transmission spectrograph. The positions of EXAFS maxima
and minima have been used to determine the bond lengths in the complexes with the help of three
different methods, namely, Levy's, Lytle's and Lytle, Sayers and Stern's (L.S.S.) methods. The phase
uncorrected bond lengths have also been determined from Fourier transforms of the experimental
spectra. The results obtained from these methods have been discussed and it has been found that the
results obtained by L.S.S. method are comparable with the results obtained by Fourier transformation
method and that these two methods give phase un...

http://iopscience.iop.org/1742-6596/534/1/012024 2014/09/26 - 12:09

The 7 wt % Cd doped and 15 wt % Mg doped ZnO thin films were deposited on quartz substrate by pulse
laser deposition system. The structural and optical properties of the prepared ZnO, Cd:ZnO and
Mg:ZnO films were investigated by X-Ray diffraction (XRD), photoluminescence and UV-Vis spectroscopy
techniques. XRD results indicate that the doped ZnO films maintain wurtzite crystal symmetry without
any defects and are oriented along c- axis. Photoluminescence studies show a sharp band edge
emission peak at 384 nm for pure ZnO film. This peak is blue shifted to 381 nm with Cd doping and
red shifted to 395 nm with Mg doping. UV visible absorption studies reveals a decrease in band gap
with Cd doping and an increase in band gap with Mg doping.

http://iopscience.iop.org/1742-6596/534/1/012047 2014/09/26 - 12:09

The X-ray absorption spectra at the K-edge for a series of copper mixed ligand, having
hydroxypyridine as one of the ligands, have been investigated in the laboratory X-ray spectroscopic
set-up. In the series only X-ray absorption near edge structure (XANES) parameters and bond length
using modified Lytle, Levy's and LSS methods were calculated. In the present study the bond lengths
are calculated by Fourier Transform method theoretically using IFEFFIT software and compared with
experimental results.

http://iopscience.iop.org/1742-6596/534/1/012028 2014/09/26 - 12:09

We have derived a linear dispersion relation for magnetosonic wave (MSW) in compensated
semiconductor plasma, like Ge, embedded with nano-sized grains (NSGs) of ions. These NSGs are
bombarded by electrons and holes in the plasma medium and usually acquire net negative charge on
account of higher mobility of electrons as compared to that of the holes [1]. The process of
charging of NSGs depletes the electron density and creates a charge imbalance, which modifies the
propagation characteristics of MSW even if NSGs do not participate in wave perturbation.

http://iopscience.iop.org/1742-6596/534/1/012058 2014/09/26 - 12:09

In the present work, the self-gravitational instability of quantum plasma is investigated including
the effects of finite Larmor radius corrections (FLR) and rotation. The formulation is done
employing quantum magnetohydrodynamic (QMHD) model. The plane wave solutions are employed on the
linearized perturbed QMHD set of equations to obtain the general dispersion relation. The rotation
is assumed only along the z- direction. The general dispersion relation is further reduced for
transverse and longitudinal directions of propagation. It is found that in transverse direction of
propagation the Jeans criterion is modified due to the rotation, FLR and quantum corrections while
in longitudinal direction of propagation it is observed that the Jeans criterion is modified by
quantum corrections only. The growth rate of perturbation is discussed numerically including the
considered parameters FLR and quantum corrections. The growth rate is observed to be modified
significantly due to the ...

http://iopscience.iop.org/1742-6596/534/1/012056 2014/09/26 - 12:09

A finest possible sample of 4% Iron and Cobalt doped ceramics of BaTiO 3 (BTO) with possible
tetragonal structure via a solid-state route was prepared. Prepared sample was characterized by
X-ray diffraction (XRD) using Bruker D8 Advance XRD instrument, the value of 2θ is in between 20 0
to 80 0 . Rietveld refinement of both samples shows the information about direct cell parameters,
direct cell volume and phase. High temperature Raman spectroscopy was performed using JOBIN-YOVN
HORIBA LABRAM HR800 single monochromator and the region of wave number is from 200 cm -1 to 800 cm
-1 from the temperature range of 27 to 207 0 C.

http://iopscience.iop.org/1742-6596/534/1/012010 2014/09/26 - 12:09

Transport and calorimetric properties of Kondo lattice system CeNi 2 Al 3 are reported. CeNi 2 Al 3
shows good agreement with Grand Kadowaki-Woods relation with degeneracy of the quasi-particle N=6.
The nonmagnetic nature of CeNi 2 Al 3 is evident from resistivity measurement even though magnetic
elements Ce and Ni are present. Three signatures, deviation from the normal metallic behaviour in
resistivity above 140 K, relatively low charge carrier concentration (10 21 cm −3 ) and energy gap E
g ~11.6 meV obtained from two band model shed light on the most basic notions related to the
semimetal nature of CeNi 2 Al 3 .

http://iopscience.iop.org/1742-6596/534/1/012039 2014/09/26 - 12:09

X-ray absorption fine structure spectroscopic (XAFS) studies have been done on two cobalt complexes
using APD (diethyl 4-amino-1-phenyl-1H-pyrazole-3,5 dicarboxylate) as ligand. The X-ray absorption
spectra of the complexes have been recorded on beam line of synchrotron at Raja Ramanna Centre for
Advanced Technology (RRCAT), Indore (India). The X-ray diffraction of the samples has also been
carried out. FTIR studies of two samples were also reported in the present communication.

http://iopscience.iop.org/1742-6596/534/1/012033 2014/09/26 - 12:09

The present paper deals with the synthesis of transition metal Schiff base complexes of copper by
chemical root method. The synthesized metal complexes have been studied by extended X-ray absorption
fine structure (EXAFS) technique. The metal ligand bond length have been determined using LSS,
Levy's and Lytle's methods. Bond-lengths have also been determined from the Fourier transform of the
EXAFS data. Bond lengths determined from these methods are comparable to each other.

http://iopscience.iop.org/1742-6596/534/1/012029 2014/09/26 - 12:09

The calorimetric and thermopower measurements on Dy 5 Ge 2 Si 2 are presented. The antiferromagnetic
ordering resulted in a sharp peak in specific heat and paramagnetic temperature as a shoulder.
Magnetic entropy ( S mag ) is estimated from the magnetic heat capacity, C mag and is in good
agreement with the theoretically calculated value. A small note on correct assessment of S mag is
presented. Thermoelectric power is analysed in line with the specific heat and a temperature region
of magnetic correlations is identified. Charge carrier density n ~2.5x10 23 cm −3 is calculated
using Sommerfeld parameter γ and diffusion thermopower constant σ D .

http://iopscience.iop.org/1742-6596/534/1/012019 2014/09/26 - 12:09

Synthesis of metal copper (II) complexes have been carried out by the chemical root method. The
X-ray K- absorption near edge measurements were carried out and the spectra have been recorded at
the K-edge of Cu using the dispersive beam line at 2.5GeV Indus-2 synchrotron radiation source RRCAT
(Raja Ramanna Center for Advance Technology), Indore, India.

http://iopscience.iop.org/1742-6596/534/1/012026 2014/09/26 - 12:09

Electron collection efficiency and hence the device performance of a dye sensitized solar cell can
be increased by localized surface plasmons (LSP) produced by the thin films of 2% silver doped TiO 2
photo electrode. These films of silver doped TiO 2 on glass substrates are prepared by pulsed laser
deposition (PLD) method and have a lowest grain size of 8-31 nm. XRD, AFM and raman studies are made
to characterize the surface at various annealing temperatures and annealing time durations. The
lowest grain size of 8 nm of these films developed.

http://iopscience.iop.org/1742-6596/534/1/012030 2014/09/26 - 12:09

In this paper, the effect of chemical treatment on electrical properties of coir fibre- reinforced
epoxy composites has been reported. For this purpose, epoxy composites reinforced with chemically
treated coir fibre prepared by hand molding method. Samples were characterized for their electrical
properties, such as dielectric constant (e 0 ), and AC conductivity (σ ac ), at different
temperatures and frequencies. It was observed that dielectric constant increases with increase in
temperature and decreases with increase in frequency from 5 KHz to 30 kHz. The peak height at the
transition temperature decreases with increasing frequency. Electrical characterization of the
samples has been done by impedance analyzer. Morphology of the samples has been done by SEM
technique. Crystalline nature of the sample has been done by XRD analysis.

http://iopscience.iop.org/1742-6596/534/1/012023 2014/09/26 - 12:09

This paper presents the cross focusing of two high power Hollow Gaussian laser beams (HGLB) by
considering ponderomotive nonlinearity in a collisionless plasma. On account of the nonlinearity
present in the plasma the two laser beams affect the dynamics of each other and cross-focusing takes
place. The expressions for the laser beam intensities by using the eikonal method have been derived
and the beam width parameter is calculated in the case when only ponderomotive nonlinearity is
operative. The numerical appreciation of the cross focusing has been presented graphically by
plotting beam-width parameter vs. dimensionless distance of propagation. Theself focusing of one
laser beam is affected due to the optical inhomogeneities introduced by another copropagatingHGLBin
the plasma. It is observed thatthe presence of one HGLBalso affects the self focusing of different
order's (n) of the other HGLB.

http://iopscience.iop.org/1742-6596/534/1/012049 2014/09/26 - 12:09

Trapping of sub-micron size particles is of interest to the biological community as well as to
nanoelectronic research and industry. We have employed spatially modified Gaussian beam to generate
narrow optical traps within diffraction limitation. A spatial light modulator is addressed with the
spatial frequencies of the required optical traps. The inverse Fourier transform is obtained at the
trap plane of the optical tweezers. We have demonstrated the trapping of sub-micron particles in
multiples traps, patterned numerically which is addressed to a spatial light modulator. The trap is
vary stable and the particles are trapped for more than 120 seconds.

http://iopscience.iop.org/1742-6596/534/1/012059 2014/09/26 - 12:09

In present study efforts have been made to analyze the role of different structural/ topological and
non-conventional physicochemical features on the X-ray absorption property wavelength of maximum
absorption λ m . Efforts are also made to compare the magnitude of various parameters for
optimization of the features mainly responsible to characterize the wavelength of maximum absorbance
λ m in X-ray absorption. For the purpose multiple linear regression method is used and on the basis
of regression and correlation value suitable model have been developed.

http://iopscience.iop.org/1742-6596/534/1/012060 2014/09/26 - 12:09

Low temperature longitudinal magnetoresistance measurement in pulsed laser deposited undoped ZnO
film has been investigated. The temperature and magnetic field dependence of the resistivity of the
film is in good agreement with the theory of weak localization and electron-electron interactions in
a disordered system. Negative magnetoresistance is a consequence of the suppression of quantum
interference effect in the weak localization theory. The inelastic scattering time τ i ~ T −3/2 and
phase coherence length L ##IMG## [http://ej.iop.org/icons/Entities/phi.gif] {phi} ( T ) ~ T −3/4
indicates that the electron-electron interaction is the dominant inelastic scattering process.

http://iopscience.iop.org/1742-6596/534/1/012042 2014/09/26 - 12:09

The Hubbard - Stratonovich transformation of many - body theory is reconsidered in various versions.
Learning from its failures in coping with competing channels of collective phenomena, a combined
Hubbard - Stratonovich transformation is proposed to overcome these difficulties. That yields a
variety of fluctuating bosonic quantum fields describing the competition of different phases in the
system under consideration. As a consequence of results, the validity of the Hubbard - Stratonovich
transformation and its relation to a given order parameter are discussed.

http://iopscience.iop.org/1742-6596/537/1/012004 2014/09/26 - 12:09

We present the exact solution of a combinatorial fragmentation model and we show how it can be used
as a touchstone for the fragmentation of atomic clusters. This model, random graphs (RG), also
called mean field percolation, displays a phase transition. In this model, the clusters are solely
described as connected entities called nodes. The connections, called bonds, can be active of
broken. We have established the algebraic formulas of the probability of all the fragmentation
channels. The results depend on the number of nodes and of the number of broken bonds. Using RG, we
show example where information was deduced from fragmentation of systems consisting of finite sets
of nodes.

http://iopscience.iop.org/1742-6596/537/1/012008 2014/09/26 - 12:09

We have investigated the thermodynamic quantities of AuCu superlattice using the statistical moment
method in the statistical physics. The free energy, thermal lattice expansion coefficients,
mean-square atomic displacements, and specific heats at the constant volume and those at the
constant pressure, C v and C p , are derived in closed analytic forms in terms of the power moments
of the atomic displacements. The present analytic formulas including the anharmonic effects of the
lattice vibration give the predicted values of these quantities.

http://iopscience.iop.org/1742-6596/537/1/012009 2014/09/26 - 12:09

It is well known that three-body systems, in general will exhibit chaotic behavior. In this work, we
study the case of the simple restricted planar three-body problem, and its application to the
Earth-Sun-Moon like system. Earth-like and Moon-like have a small mass relative to the Sun-like
object. The Moon-like is affected both centrifugal and Coriolis forces, and it would not be able to
escape from the Hill disc. The trajectories of the Moon-like was viewed in a rotating frame which
fixes the two more massive bodies Sun-like and Earth-like, so able reduced to a simple two-degrees
of freedom system. It is possible to construct a more generalized model for investigation the
chaotic behavior of tide forces on Earth also discussed.

http://iopscience.iop.org/1742-6596/537/1/012012 2014/09/26 - 12:09

Up to now, all the diffusion theories have shown that the direction of diffusion flux is from high
concentration area to lower concentration area (forward diffusion) and diffusivity is positive. In
some research on simultaneous diffusion of boron and point defects in Si, the results show that the
diffusivity of interstitials can be negative and diffusion process can be backward diffusion. In
backward diffusion process, the direction of diffusion flux is from low concentration area to higher
concentration area. The phenomenon of backward diffusion and negative diffusivity should be
explained. Based on thermodynamic theory, the equation of backward diffusion and negative
diffusivity are presented and discussed.

http://iopscience.iop.org/1742-6596/537/1/012011 2014/09/26 - 12:09

It is observed that a short time data set of market returns presents almost symmetric Boltzmann
distribution whereas a long time data set tends to show a Gaussian distribution. To understand this
universal phenomenon, many hypotheses which are spreading in a wide range of interdisciplinary
research were proposed. In current work, the effects of background fluctuations on symmetric
Boltzmann distribution is investigated. The numerical calculation is performed to show that the
Gaussian noise may cause the transition from initial Boltzmann distribution to Gaussian one. The
obtained results would reflect non-dynamic nature of the transition under consideration.

http://iopscience.iop.org/1742-6596/537/1/012005 2014/09/26 - 12:09

We consider some version of q -deformed multimode boson oscillators. The realization of SU q (2)
algebra in terms of q -deformed multimode boson oscillators which involves q -interference between
oscillators of different modes and the realization of SU q (2) algebra in terms of q- deformed
multimode boson oscillators in which each oscillator mode has its own defomation parameter are
constracted.

http://iopscience.iop.org/1742-6596/537/1/012010 2014/09/26 - 12:09

Fermions in the model of electroweak-scale right-handed neutrinos (EWRH) with masses of the order of
300 GeV or more could result in dynamical electroweak symmetry breaking by forming condensates
through the exchange of a fundamental Higgs scalar doublet or triplet. These condensates are
dynamically studied within the framework of the Schwinger- Dyson equation. With the electroweak
symmetry broken by condensates, the fully worked-out model of EWRH in which there are two doublets
and two triplets, one of which is composite and the others being the original fundamental scalar
doublet and triplet could be suitable for recent LHC discovery of the 125 GeV scalar particle.

http://iopscience.iop.org/1742-6596/537/1/012016 2014/09/26 - 12:09

All papers published in this volume of Journal of Physics: Conference Series have been peer reviewed
through processes administered by the proceedings Editors. Reviews were conducted by expert referees
to the professional and scientific standards expected of a proceedings journal published by IOP
Publishing.

http://iopscience.iop.org/1742-6596/537/1/011002 2014/09/26 - 12:09

Effective potentials for finding the ground states and physical configurations have essential
meaning in many Coulomb problems of condensed and soft matters. The ordinary n-Pade approximation
potentials define as the ratio of Pi(r)/Pi+1(r), where Pi(r) are the polynomials of i-th order of
charge separation r, give quite good fit and agreement of calculation results and experimental data
for Coulomb problems, where screening effects are not important or exchange photons still are
massless. In this work we consider a general Pade effective potential by included a factor of
exponential form, which could give more accurate results also for above mentioned cases. This
general Pade effective potentials with analytical expressions were useful to perform analytical
calculations, estimations and to reduce the amount of computational time for future investigations
in condensed and soft matter topics. For example of soft matter problems, we study the case of MS2
virus, the general Pade pot...

http://iopscience.iop.org/1742-6596/537/1/012013 2014/09/26 - 12:09

The longitudinal radioelectrical efffect in a parabolic quantum well (PQW) has been studied, based
on the quantum kinetic equation for electrons under the action of a linearly polarized
electromagnetic wave (EMW) and an intense laser field. Analytic expressions for the density of the
current associated with the drag of charge carriers for the case of electron optical phonon
scattering is calculated. The dependence of the current density on the intensity F and the frequency
O of the laser radiation field, the frequency ω of the linearly polarized EMW field, the frequency
of the parabolic potential, the temperature T of the system are obtained. The analytic expressions
are numerically evaluated and plotted for a specific quantum wells, GaAs/AlGaAs. All the results of
PQW are compared with semiconductors builk and superlattice shows that the difference.

http://iopscience.iop.org/1742-6596/537/1/012003 2014/09/26 - 12:09

The absorption spectra of deoxyhemoglobin and oxyneuroglobin has been examined. The well-known
two-level model has been used to study the absorption spectra. The model has been verified by
experemental data for heomoglobin and neuroglobin, that gives good fittings. The discussion on the
obtained results leads to further works

http://iopscience.iop.org/1742-6596/537/1/012006 2014/09/26 - 12:09

To solve the μ problem of the Minimal Supersymmetric Standard Model (MSSM), a single field S is
added to build the Next Minimal Supersymmetric Standard Model (NMSSM). Vacuum enlarged with non-zero
vevs of the neutral-even CP is the combination of H u , H d and S. In the NMSSM, the higgs sector is
increased to 7 higgs (compared with 5 higgs in the MSSM), including three higgs which are even-CP h
1,2,3 (m h1 < m h2 < m h3 ), two higgs which are odd-CP a 1,2 ( m a1 < m a 2 ) and a couple of
charged higgs H ± . The decays higgs into higgs is one of the remarkable new points of the NMSSM. In
this paper we study some decays of neutral Higgs bosons. The numerical results are also presented
together with evaluations.

http://iopscience.iop.org/1742-6596/537/1/012015 2014/09/26 - 12:09

We examine the formation of the two-dimensional electron gas (2-DEG) at the n-type interface of two
band insulators LaAlO 3 (LAO) and SrTiO 3 (STO) by increasing the thickness of the LAO layers in the
framework of the density functional theory (DFT). It has been shown that a metal-insulator phase
transition occurs in the 2-DEG when the LAO layers reach to a critical thickness d c = 4 monolayers.
The increase of the LAO layers enhances the LAO potential so that electrons can transfer from the
LAO valence band to the STO conduction band, which confines conducting electrons only in the STO
substrate.

http://iopscience.iop.org/1742-6596/537/1/012007 2014/09/26 - 12:09

The combination of theory and simulation is necessary in the investigation of properties of complex
systems where each method alone cannot do the task properly. Theory needs simulation to test ideas
and to check approximations. Simulation needs theory for modeling and for understanding results
coming out from computers. In this review, we give recent examples to illustrate this necessary
combination in a few domains of interest such as frustrated spin systems, surface magnetism, spin
transport and melting. Frustrated spin systems have been intensively studied for more than 30 years.
Surface effects in magnetic materials have been widely investigated also in the last three decades.
These fields are closely related to each other and their spectacular development is due to numerous
applications. We confine ourselves to theoretical developments and numerical simulations on these
subjects with emphasis on spectacular effects occurring at frontiers of different phases.

http://iopscience.iop.org/1742-6596/537/1/012001 2014/09/26 - 12:09

We perform a first-principles density functional theory study on structural and electronic
properties of a sery of crystal-phase heterostructure atomic-scale superlattice (SL) nanowires (NW)
from GaN material, i.e. GaN wurtzite(WZ) /zincblende (ZB) material interface. The effects of
surface/interface relaxation and surface stress which are absent in atomistic models are carefully
taken into account. Structural properties, energy bands and electronic properties for a class of
hexagonal wires with various period of SL structure and diameter size are discussed. Pseudo hydrogen
atoms, i.e. hydrogen with partial charges, are used to passivate the dangling surface bonds, which
remove the localized in-gap surface states and suppress the surface reconstructions. With this
passivation procedure the band structure show the type II for all wires. While the electrical
aspects of these SL nanowires are explored through density functional theory, their subsequent band
structures are used to d...

http://iopscience.iop.org/1742-6596/537/1/012002 2014/09/26 - 12:09

This volume contains selected papers presented at the 38th National Conference on Theoretical
Physics (NCTP–38) and the 1st International Workshop on Theoretical and Computational Physics:
Condensed Matter, Soft Matter and Materials Physics (IWTCP–1). Both the conference and the workshop
were held from 29 July to 1 August 2013 in Pullman hotel, Da Nang, Vietnam. The IWTCP–1 was a new
activity of the Vietnamese Theoretical Physics Society (VTPS) organized in association with the 38th
National Conference on Theoretical Physics (NCTP–38), the most well–known annual scientific forum
dedicated to the dissemination of the latest development in the field of theoretical physics within
the country. The IWTCP–1 was also an External Activity of the Asia Pacific Center for Theoretical
Physics (APCTP). The overriding goal of the IWTCP is to provide an international forum for
scientists and engineers from academia to share ideas, problems and solution relating to the
recent...

http://iopscience.iop.org/1742-6596/537/1/011001 2014/09/26 - 12:09

We suggest a new schema of trapping cold atoms using a two-color evanescent light field around a
carbon nanotube. The two light fields circularly polarized sending through a carbon nanotube
generates an evanescent wave around this nanotube. By evanescent effect, the wave decays away from
the nanotube producing a set of trapping minima of the total potential in the transverse plane as a
ring around the nanotube. This schema allows capture of atoms to a cylindrical shell around the
nanotube. We consider some possible boundary conditions leading to the non-trivial bound state
solution. Our result will be compared to some recent trapping models and our previous trapping
models.

http://iopscience.iop.org/1742-6596/537/1/012014 2014/09/26 - 12:09

The X-ray absorption spectra at the K-edge of copper have been recorded in five mixed ligand copper
complexes having orthophenylenediamine as one of the ligand. Various X-ray absorption near edge
structure (XANES) parameters, such as chemical shift, i.e., shift of K-edge of copper in complexes
with respect to K-edge of copper metal, energy position of principal absorption maximum and
edge-width have been determined. Copper has been found to be in oxidation state +2 in all the
complexes. From these XANES data the effective nuclear charge on copper and percentage covalency in
these complexes has been estimated.

http://iopscience.iop.org/1742-6596/534/1/012009 2014/09/24 - 22:16

Nano crystalline Mn 1−x Zn x Fe 2 O 4 (x = 0.0 − 1.0) spinel ferrite have been synthesized by
sol-gel auto-combustion method. Prepared samples were annealed at 1000 ° C for 3 hrs to study the
effect of high temperature sintering on their structural and magnetic properties. The x-ray
diffraction (XRD) analysis reveals the presence of cubic spinel phase and, secondary phase of β-Fe 2
O 3 . Variation in the structural parameters obtained from XRD analysis are interpreted in terms of
changes in the Zn concentration. Obtained magnetic properties can be ascribed to the solubility of
cations in the ferrite lattice and distribution of cations on tetrahedral and octahedral sites.

http://iopscience.iop.org/1742-6596/534/1/012016 2014/09/24 - 22:16