
Modern Physics Letters B [SJR: 0.32] [HI: 29] [1 followers] Follow Hybrid journal (It can contain Open Access articles) ISSN (Print) 02179849  ISSN (Online) 17936640 Published by World Scientific [118 journals] 
 Modified cubic Bspline differential quadrature method for numerical
solution of threedimensional coupled viscous Burger equation Authors: H. S. Shukla, Mohammad Tamsir, Vineet K. Srivastava, Mohammad Mehdi Rashidi
Abstract: Modern Physics Letters B, Volume 30, Issue 11, 30 April 2016.
In this paper, we propose a modified cubic Bspline differential quadrature method (MCBDQM) to solve threedimensional (3D) coupled viscous Burger equation with appropriate initial and boundary conditions. In this method, modified cubic Bspline is treated as a basis function in the differential quadrature method (DQM) to compute the weighting coefficients. In this way, the Burger equation is reduced into a system of ordinary differential equations. An optimal strong stabilitypreserving Runge–Kutta (SSPRK) method is employed to solve the resulting system of ordinary differential equations. In order to illustrate the accuracy and efficiency of the proposed method, a numerical problem is considered. From the numerical experiment, it is found that the computed result is in good agreement with the exact solution. Stability analysis of the method is also carried out using the matrix stability analysis method and found to be unconditionally stable.
Citation: Modern Physics Letters B
PubDate: 20160429T08:29:55Z
DOI: 10.1142/S0217984916501104
 Authors: H. S. Shukla, Mohammad Tamsir, Vineet K. Srivastava, Mohammad Mehdi Rashidi
 Perfect metamaterial absorbers with polarization angle
independency in Xband waveguide Authors: Cumali Sabah
Abstract: Modern Physics Letters B, Volume 30, Issue 11, 30 April 2016.
The design and characterization of perfect metamaterial absorbers (MAs) based on simple configurations including square and triangleshapes, which operate in Xband frequency region are numerically and experimentally investigated. The proposed MAs provide perfect absorption with the polarization angle independency. In Xband waveguide, the absorption rates are 99.69% and 99.97% at the resonance frequencies of 10.57 GHz and 10.93 GHz for the square and triangleshaped MAs, respectively. In addition, the same configurations are numerically tested under free space boundary conditions to compare and discuss the obtained results. The suggested MAs enable myriad potential application areas for security and stealth technologies in Xband including wireless communication.
Citation: Modern Physics Letters B
PubDate: 20160429T08:29:52Z
DOI: 10.1142/S0217984916501864
 Authors: Cumali Sabah
 Coupling centrality and authority of coprocessing model on complex
networks Authors: Zhanli Zhang, Huibin Li
Abstract: Modern Physics Letters B, Volume 30, Issue 11, 30 April 2016.
Coupling centrality and authority of coprocessing model on complex networks are investigated in this paper. As one crucial factor to determine the processing ability of nodes, the information flow with potential time lag is modeled by coprocessing diffusion which couples the continuous time processing and the discrete diffusing dynamics. Exact results on master equation and stationary state are obtained to disclose the formation. Considering the influence of a node to the global dynamical behavior, coupling centrality and authority are introduced for each node, which determine the relative importance and authority of nodes in the diffusion process. Furthermore, the experimental results on largescale complex networks confirm our analytical prediction.
Citation: Modern Physics Letters B
PubDate: 20160429T08:29:49Z
DOI: 10.1142/S021798491650113X
 Authors: Zhanli Zhang, Huibin Li
 Pulse evolution in midinfrared femtosecond optical parametric oscillator
based on silicononinsulator waveguides Authors: Jin Wen
Abstract: Modern Physics Letters B, Volume 30, Issue 11, 30 April 2016.
The pulse evolution of midinfrared optical parametric oscillator based on silicononinsulator (SOI) waveguides is numerically investigated. The properties of pulse evolution in the process of optical parametric oscillation have been described. The numerical results show that the threshold of the optical parametric oscillation cavity can be lowered due to the high nonlinearity of the waveguide. The parametric signals initiate to oscillate when the circle trip number is 5 with the appropriate length of the SOI waveguide 7 mm. Meanwhile the peak power of the output signal pulse can be reached to 400 W at the stable situation when the circle trip number is over 10 with the conversion efficiency as high as 5%. This research can supply a kind of way to generate the midinfrared femtosecond pulse at the highly stable onchip integration level.
Citation: Modern Physics Letters B
PubDate: 20160429T08:29:35Z
DOI: 10.1142/S0217984916501633
 Authors: Jin Wen
 Onepot room temperature synthesizing Cu and Mndoped ZnSe nanocrystals
by a rapid photochemical method Authors: A. R. Bahador, M. Molaei, M. Karimipour
Abstract: Modern Physics Letters B, Volume 30, Issue 11, 30 April 2016.
In this work, a onepot, rapid, green and room temperature photochemical synthesis of transition metal (TM; Cu, Mn)doped ZnSe nanocrystals (NCs) was reported. NCs were successfully characterized using Fourier transforminfrared (FTIR), photoluminescence (PL) and UVVisible (UVVis) spectroscopy, transmission electron microscopy (TEM), Xray diffractometry (XRD) and energy dispersive Xray spectra (EDX). FTIR spectra confirmed the capping of ZnSe by thioglycolic acid (TGA) molecules. XRD and TEM analysis demonstrated zinc blend phase NCs with an average size of around 3 nm. Band gap of ZnSe NCs was about 3.6 eV which it was decreased by increasing the illumination time. PL spectra of ZnSe NCs showed a broad emission with two peaks located at 380 nm and 490 nm related to excitonic and trap states emission, respectively. For ZnSe:Cu NCs, excitonic emission disappeared completely and PL intensity of trap states emission increased with the increase in the Cu[math] ion concentration so that for precursor ratio of Cu:Zn 1%, optimal value of PL intensity was obtained. For ZnSe:Mn NCs, the excitonic emission decreased gradually with the increase in the impurity concentration whereas trap state emission increased. Moreover, a peak about 590 nm was appeared from 4T16A1 transition of the Mn[math] impurity, demonstrating the Mn incorporation inside the ZnSe NCs structure.
Citation: Modern Physics Letters B
PubDate: 20160429T08:29:30Z
DOI: 10.1142/S0217984916502274
 Authors: A. R. Bahador, M. Molaei, M. Karimipour
 An efficient [math] threshold quantum secret sharing
without entanglement Authors: Huawang Qin, Yuewei Dai
Abstract: Modern Physics Letters B, Ahead of Print.
An efficient [math] threshold quantum secret sharing (QSS) scheme is proposed. In our scheme, the Hash function is used to check the eavesdropping, and no particles need to be published. So the utilization efficiency of the particles is real 100%. No entanglement is used in our scheme. The dealer uses the single particles to encode the secret information, and the participants get the secret through measuring the single particles. Compared to the existing schemes, our scheme is simpler and more efficient.
Citation: Modern Physics Letters B
PubDate: 20160429T02:03:38Z
DOI: 10.1142/S0217984916501384
 Authors: Huawang Qin, Yuewei Dai
 Alcohol vapor sensing by cadmiumdoped zinc oxide thick films based
chemical sensor Authors: R. A. Zargar, M. Arora, S. Chackrabarti, S. Ahmad, J. Kumar, A. K. Hafiz
Abstract: Modern Physics Letters B, Ahead of Print.
Cadmiumdoped zinc oxide nanoparticles were derived by simple chemical coprecipitation route using zinc acetate dihydrate and cadmium acetate dihydrate as precursor materials. The thick films were casted from chemical coprecipitation route prepared nanoparticles by economic facile screen printing method. The structural, morphological, optical and electrical properties of the film were characterized relevant to alcohol vapor sensing application by powder XRD, SEM, UVVIS and DC conductivity techniques. The response and sensitivity of alcohol (ethanol) vapor sensor are obtained from the recovery curves at optimum working temperature range from 20[math]C to 50[math]C. The result shows that maximum sensitivity of the sensor is observed at 25[math]C operating temperature. On varying alcohol vapor concentration, minor variation in resistance has been observed. The sensing mechanism of sensor has been described in terms of physical adsorption and chemical absorption of alcohol vapors on cadmiumdoped zinc oxide film surface and inside film lattice network through weak hydrogen bonding, respectively.
Citation: Modern Physics Letters B
PubDate: 20160429T02:01:19Z
DOI: 10.1142/S0217984916502444
 Authors: R. A. Zargar, M. Arora, S. Chackrabarti, S. Ahmad, J. Kumar, A. K. Hafiz
 New solitary solutions in FPU[math] atom chain
 Authors: JinXing Li, Shaowu Zhang, Fei Liu, Yu Gao
Abstract: Modern Physics Letters B, Ahead of Print.
Solitons in onedimensional FPU[math] lattice chains were studied by the Jacobi elliptic function expansion method under the condition of quasicontinuum approximation. It is found that there exhibits a novel nonlinear elementary excitation, i.e. exact solitary solutions. On the basis of the above, the influence of the nonlinear intensity on the solitons was analyzed. It is found that the modulation amplitude of soliton is related closely to the nonlinear parameter also.
Citation: Modern Physics Letters B
PubDate: 20160429T02:01:17Z
DOI: 10.1142/S0217984916501219
 Authors: JinXing Li, Shaowu Zhang, Fei Liu, Yu Gao
 Effects of vanadium alloying on the microstructures and mechanical
properties of hotpressed tungsten material Authors: Wei Guo, Kameel Arshad, Yue Yuan, MingYue Zhao, XiaoLin Shu, ZhangJian Zhou, Ying Zhang, GuangHong Lu
Abstract: Modern Physics Letters B, Ahead of Print.
Tungsten and vanadium (W–V) alloys (with 1, 5 and 10 wt.% V) are fabricated by hot pressing (HP) at 1800[math]C under 20 MPa for 2 h. The effects of V content on the microstructures and mechanical properties of W–V alloy are investigated. The results indicate that with increasing V content, (i) the formation of W–V alloying phase is enhanced and the grain size of Wmatrix is significantly refined; (ii) the relative density gradually increases from 92.16% to 97.72% in the case of pure W to W10 wt.% V; (iii) the hardness rises linearly while the bending strength decreases, which is related to the enhanced alloy phase formation.
Citation: Modern Physics Letters B
PubDate: 20160426T09:33:18Z
DOI: 10.1142/S021798491650216X
 Authors: Wei Guo, Kameel Arshad, Yue Yuan, MingYue Zhao, XiaoLin Shu, ZhangJian Zhou, Ying Zhang, GuangHong Lu
 The optimization of measurement device independent quantum key
distribution Authors: Feng Gao, HaiQiang Ma, RongZhen Jiao
Abstract: Modern Physics Letters B, Ahead of Print.
Measurement device independent quantum key distribution (MDIQKD) is a promising method for realistic quantum communication which could remove all the sidechannel attacks from the imperfections of the devices. Here in this study, we theoretically analyzed the performance of the MDIQKD system. The asymptotic case rate with the increment of the transmission distance at different polarization misalignment, background count rate and intensity is calculated respectively. The result may provide important parameters for practical application of quantum communications.
Citation: Modern Physics Letters B
PubDate: 20160422T08:46:33Z
DOI: 10.1142/S021798491650189X
 Authors: Feng Gao, HaiQiang Ma, RongZhen Jiao
 Dynamic secondary electron emission characteristics of polymers in
negative charging process Authors: Ming Weng, TianCun Hu, Na Zhang, Meng Cao
Abstract: Modern Physics Letters B, Ahead of Print.
We studied the dynamic secondary electron emission (SEE) characteristics of a polyimide sample in negative charging process under electron bombardment. The time evolution of secondary electron yield (SEY) has been measured with a pulsed electron gun. The dynamic SEY, as well as the surface potential have been analyzed using a capacitance model. The shift in surface potential caused by the negative charge accumulation on the sample reduces the landing energy of the primary electrons (PEs), which in turn alters the SEY. The charging process tends to be stable when the landing energy of PEs reaches the secondary crossover energy where the corresponding SEY is 1. The surface potential has an approximately negative exponential relationship with the irradiation time. The total accumulated charge at the stable state is found to be proportional to the product of the sample capacitance and the difference between initial incident energy and the secondary crossover energy. The time constant of the exponential function is proportional to the ratio of final accumulated charge to the incident current.
Citation: Modern Physics Letters B
PubDate: 20160422T08:46:31Z
DOI: 10.1142/S0217984916501682
 Authors: Ming Weng, TianCun Hu, Na Zhang, Meng Cao
 A study to investigate phase transitions and nucleation kinetics of nickel
and copper Authors: F. A. Celik, A. K. Yildiz
Abstract: Modern Physics Letters B, Ahead of Print.
In this study, we investigate the homogeneous nucleation kinetics of copper and nickel system during cooling process using molecular dynamics simulation (MDS). The calculation is carried out for a different number of atoms consisting of 500, 2048, 8788 and 13,500 based on embedded atom method (EAM). It is observed that the melting points for the both model increases with increasing the size of systems (i.e. the number of atoms) as expected from Parrinello and Rahman MD method. The interfacial free energies and critical nucleus radius of nickel and copper are also determined by molecular dynamics, and the results are consistent with the classical nucleation theory. The structural development and phase transformation are also determined from the radial distribution function (RDF) and local bond orientational order parameters (LBOO).
Citation: Modern Physics Letters B
PubDate: 20160420T11:44:26Z
DOI: 10.1142/S0217984916501293
 Authors: F. A. Celik, A. K. Yildiz
 Direct perturbation analysis on the localized waves of the modified
 Authors: Min Li, Tao Xu, Lei Wang
Abstract: Modern Physics Letters B, Ahead of Print.
In this paper, the modified nonlinear Schrödinger equation is investigated via the direct perturbation method, which can describe the femtosecond optical pulse propagation in a monomodal optical fiber. Considering the quintic nonlinear perturbation, we obtain the approximate solution with the firstorder correction, which can be expressed by the solution and symmetry of the derivative nonlinear Schrödinger equation. Under the nonvanishing boundary conditions, the approximate dark and antidark soliton solutions are derived and the existence conditions are also given. The effects of the perturbation on the propagations and interactions of the solitons on the nonzero background are discussed by comparing the physical quantities of solitons with the unperturbed case. It is found that the quintic nonlinear perturbation can lead to the change of the velocity as well as the pulse compression, but has no influence on the dynamics of the elastic interactions. Finally, numerical simulations are performed to support the theoretical results.
Citation: Modern Physics Letters B
PubDate: 20160420T11:44:22Z
DOI: 10.1142/S0217984916501797
 Authors: Min Li, Tao Xu, Lei Wang
 Influence of Cr deficiency on sintering, thermal expansion and electrical
properties of La[math]Sr[math]Cr[math]O[math] as a SOFC interconnect
material Authors: Yi Ren, Wen Ma, Xiaoying Li, Jun Wang, Yu Bai, Hongying Dong
Abstract: Modern Physics Letters B, Ahead of Print.
The SOFC interconnect materials La[math]Sr[math]Cr[math]O[math] ([math]–0.04) were prepared using an autoignition process. The influences of Cr deficiency on their sintering, thermal expansion and electrical properties were investigated. All the samples were pure perovskite phase after sintering at 1400[math]C for 4 h. The cell volume of La[math]Sr[math]Cr[math]O[math] decreased with increasing Cr deficient content. The relative density of the sintered bulk samples increased from 93.2% [math] to a maximum value of 94.7% [math] and then decreased to 87.7% [math]. The thermal expansion coefficients of the sintered bulk samples were in the range of 10.60–[math] (30–1000[math]C), which are compatible with that of YSZ. Among the investigated samples, the sample with 0.02 Cr deficiency had a maximum conductivity of 40.4 Scm[math] and the lowest Seebeck coefficient of 154.8 [math]VK[math] at 850[math]C in pure He. The experimental results indicate that La[math]Sr[math]Cr[math]O[math] has the best properties and is much suitable for SOFC interconnect material application.
Citation: Modern Physics Letters B
PubDate: 20160420T11:44:18Z
DOI: 10.1142/S021798491650127X
 Authors: Yi Ren, Wen Ma, Xiaoying Li, Jun Wang, Yu Bai, Hongying Dong
 Influence of maingroup element on halfmetallic properties in
halfHeusler compound Authors: Hongyan Liu, Yushan Li, Fuyang Tian, Getian Li
Abstract: Modern Physics Letters B, Ahead of Print.
We investigate the band structure, magnetism and density of states of halfHeusler compounds CoCr[math] ([math] = Si, Ge, P, As) based on the firstprinciple calculations. Combined with molecular orbital hybridization theory, we discuss the influence of the maingroup element on halfmetallic properties of CoCr[math]. It is found that the replacement of Ge for Si in CoCrSi can adjust the position of the Fermi level, and while it has no impact on the energy gap width and magnetic structure. However, the substitution of P for Si can effectively adjust the magnetism without disrupting its halfmetallicity. Our results demonstrate that the electronic structure of CoCr[math] is mainly dependent on the number of valence electrons of the maingroup element.
Citation: Modern Physics Letters B
PubDate: 20160413T10:05:18Z
DOI: 10.1142/S0217984916502067
 Authors: Hongyan Liu, Yushan Li, Fuyang Tian, Getian Li
 Theoretical investigations of the structural, electronic and optical
properties of Hg[math]Cd[math]S alloys Authors: S. AlRajoub, B. Hamad
Abstract: Modern Physics Letters B, Ahead of Print.
The structural, electronic and optical properties of mercury cadmium sulfide (Hg[math]Cd[math]S) alloys with [math] = 0.0, 0.25, 0.5, 0.75 are studied using density functional theory (DFT) within fullpotential linearized augmented plane wave (FPLAPW) method. We used the local density approximation (LDA), the generalized gradient approximation (GGA), Hubbardcorrected functionals (GGA/LDA[math]+[math][math]) and the modified Becke–Johnson (LDA/GGA)mjb hybrid potentials to treat the exchangecorrelation functional [math]. We found that LDA functional predicts better lattice constants than GGA functional. Mercury sulfide (HgS) binary alloy was found to exhibit a semimetallic behavior using all functional with an inverted band gap close to the experimental value. However, the hybrid functionals were more successful than LDA and GGA functionals to predict the correct electronic structure of Hg[math]Cd[math]S ternary alloys. The results of the electronic and optical band gaps are consistent for Hg[math]Cd[math]S ternary alloys.
Citation: Modern Physics Letters B
PubDate: 20160413T08:35:18Z
DOI: 10.1142/S0217984916501736
 Authors: S. AlRajoub, B. Hamad
 Emergent “quantum” theory in complex adaptive systems
 Authors: Djordje Minic, Sinisa Pajevic
Abstract: Modern Physics Letters B, Ahead of Print.
Motivated by the question of stability, in this paper we argue that an effective quantumlike theory can emerge in complex adaptive systems. In the concrete example of stochastic Lotka–Volterra dynamics, the relevant effective “Planck constant” associated with such emergent “quantum” theory has the dimensions of the square of the unit of time. Such an emergent quantumlike theory has inherently nonclassical stability as well as coherent properties that are not, in principle, endangered by thermal fluctuations and therefore might be of crucial importance in complex adaptive systems.
Citation: Modern Physics Letters B
PubDate: 20160330T07:14:50Z
DOI: 10.1142/S0217984916502018
 Authors: Djordje Minic, Sinisa Pajevic
 Direct ink writing of specialshaped structures based on TiO2 inks
 Authors: Yayun Li, Longtu Li, Bo Li
Abstract: Modern Physics Letters B, Ahead of Print.
Direct ink writing (DIW) method is a novel kind of ceramic fabrication approach which allows one to design and rapidly construct ceramic products in complex shapes without the need for any lithographic masks, dies or expensive moulds. A 40 wt.% waterbased titanium dioxide (TiO2) suspension was formulated. With the help of DIW technique, twodimensional (2D) spiral structures, threedimensional (3D) woodpile structures, cylindrical structures and half conical structures at micrometer scale were fabricated. According to the rheological test, the ink shows a shearthinning behavior and appropriate viscoelastic properties, which ensures a feasible shaping process. The scanning electron microscopy (SEM) test shows that the samples sintered at 1050[math]C for 2 h have formed ceramics completely. The DIW method has merits to pattern ceramics into specialshaped structures into two and three dimensions with high precision and good designability, which provides new ideas and methods for structural, functional and biomedical applications.
Citation: Modern Physics Letters B
PubDate: 20160323T07:17:07Z
DOI: 10.1142/S0217984916502122
 Authors: Yayun Li, Longtu Li, Bo Li
 Free electromagnetic radiation from the graphene monolayer with spatially
modulated conductivity in THz range Authors: Vladimir Gerasik, Marek S. Wartak, Alexander V. Zhukov, Mikhail B. Belonenko
Abstract: Modern Physics Letters B, Ahead of Print.
An infinite graphene layer is known to support graphene surface plasmon polariton (GSP) confined at the interface between the two dielectric halfspaces. In the case of finite width graphene stripe, the termination of the graphene layer acts both as a scattering source and as a “mirror”, thus producing Fabry–Perot (FP)type resonance. These resonant wavelengths in the presence of freestanding graphene stripe are investigated using the homogeneous convolutiontype integral equation approach. The capabilities of the suggested numerical method are illustrated with the results for the transmission spectrum of TM electromagnetic waves travelling in the direction perpendicular to the graphene stripe. Special attention is paid to the case of spatially modulated conductivity of the graphene monolayer, and thus the feasibility of controlling the GSP response.
Citation: Modern Physics Letters B
PubDate: 20160308T01:11:17Z
DOI: 10.1142/S0217984916501852
 Authors: Vladimir Gerasik, Marek S. Wartak, Alexander V. Zhukov, Mikhail B. Belonenko