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  Subjects -> PHYSICS (Total: 780 journals)
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PHYSICS (565 journals)            First | 1 2 3 4 5 6 | Last

Journal of Physics D : Applied Physics     Hybrid Journal   (Followers: 10)
Journal of Physics: Condensed Matter     Hybrid Journal   (Followers: 8)
Journal of Physics: Conference Series     Open Access   (Followers: 3)
Journal of Plasma Physics     Hybrid Journal   (Followers: 4)
Journal of Polymer Science Part B: Polymer Physics     Hybrid Journal   (Followers: 24)
Journal of Porous Materials     Hybrid Journal   (Followers: 2)
Journal of Porphyrins and Phthalocyanines     Hybrid Journal   (Followers: 2)
Journal of Quantitative Spectroscopy and Radiative Transfer     Hybrid Journal  
Journal of Reinforced Plastics and Composites     Hybrid Journal   (Followers: 27)
Journal of Research in Physics     Open Access  
Journal of Rheology     Full-text available via subscription   (Followers: 6)
Journal of Romance Studies     Full-text available via subscription   (Followers: 2)
Journal of Sandwich Structures and Materials     Hybrid Journal   (Followers: 1)
Journal of Scientific Research     Open Access   (Followers: 1)
Journal of Semiconductors     Full-text available via subscription   (Followers: 2)
Journal of Sensors     Open Access   (Followers: 9)
Journal of Sol-Gel Science and Technology     Hybrid Journal   (Followers: 1)
Journal of Solid State Lighting     Open Access  
Journal of Solid State Physics     Open Access  
Journal of Spectroscopy     Open Access   (Followers: 6)
Journal of Superconductivity and Novel Magnetism     Partially Free   (Followers: 1)
Journal of Synchrotron Radiation     Hybrid Journal   (Followers: 1)
Journal of Testing and Evaluation     Full-text available via subscription   (Followers: 17)
Journal of the American Society for Mass Spectrometry     Hybrid Journal   (Followers: 23)
Journal of the Brazilian Society of Mechanical Sciences     Open Access   (Followers: 1)
Journal of the ICRU     Hybrid Journal  
Journal of the Korean Physical Society     Partially Free   (Followers: 1)
Journal of Theoretical and Applied Physics     Open Access   (Followers: 1)
Journal of Tissue Engineering     Open Access   (Followers: 4)
Journal of Ultrasound in Medicine     Full-text available via subscription   (Followers: 5)
Journal of Vibration and Control     Hybrid Journal   (Followers: 28)
Journal of Visualization     Hybrid Journal   (Followers: 2)
Journal of Zhejiang University SCIENCE A     Hybrid Journal  
Jurnal Penelitian Sains (JPS)     Open Access  
Karbala International Journal of Modern Science     Open Access  
Language Learning Journal     Hybrid Journal   (Followers: 13)
Lasers in Surgery and Medicine     Hybrid Journal   (Followers: 1)
Latvian Journal of Physics and Technical Sciences     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Les Houches Summer School Proceedings     Full-text available via subscription  
Letters in Mathematical Physics     Hybrid Journal   (Followers: 3)
Light : Science & Applications     Open Access  
Living Reviews in Relativity     Open Access  
Living Reviews in Solar Physics     Open Access  
Lubrication Science     Hybrid Journal  
Macalester Journal of Physics and Astronomy     Open Access  
Machining Science and Technology: An International Journal     Hybrid Journal   (Followers: 3)
Magnetic Resonance Materials in Physics, Biology and Medicine     Hybrid Journal   (Followers: 1)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 4)
MAPAN     Hybrid Journal  
Mass Spectrometry Reviews     Hybrid Journal   (Followers: 22)
Matéria (Rio de Janeiro)     Open Access   (Followers: 1)
Materials & Design     Hybrid Journal   (Followers: 35)
Materials at High Temperatures     Full-text available via subscription   (Followers: 4)
Materials Chemistry and Physics     Full-text available via subscription   (Followers: 13)
Materials Research     Open Access   (Followers: 6)
Materials Research Bulletin     Hybrid Journal   (Followers: 19)
Materials Research Innovations     Hybrid Journal   (Followers: 1)
Materials Science     Hybrid Journal   (Followers: 8)
Materials Science and Engineering: A     Hybrid Journal   (Followers: 37)
Materials Science and Engineering: B     Hybrid Journal   (Followers: 18)
Materials Science and Engineering: C     Hybrid Journal   (Followers: 18)
Materials Science and Engineering: R: Reports     Hybrid Journal   (Followers: 13)
Materials Science and Technology     Hybrid Journal   (Followers: 23)
Matériaux & Techniques     Full-text available via subscription   (Followers: 2)
Mathematical Physics, Analysis and Geometry     Hybrid Journal   (Followers: 1)
Mathematics and Mechanics of Solids     Hybrid Journal   (Followers: 2)
Meccanica     Hybrid Journal   (Followers: 1)
Mechanics of Advanced Materials and Structures     Hybrid Journal   (Followers: 3)
Mechanics of Materials     Hybrid Journal   (Followers: 13)
Mechanics of Time-Dependent Materials     Hybrid Journal   (Followers: 1)
Mechanics Research Communications     Hybrid Journal   (Followers: 2)
Metamaterials     Hybrid Journal   (Followers: 2)
Micro and Nano Systems Letters     Open Access   (Followers: 4)
Microfluidics and Nanofluidics     Hybrid Journal   (Followers: 10)
Microporous and Mesoporous Materials     Hybrid Journal   (Followers: 6)
Modern Instrumentation     Open Access   (Followers: 3)
Modern Physics Letters A     Hybrid Journal   (Followers: 1)
Modern Physics Letters B     Hybrid Journal  
Molecular Diversity     Hybrid Journal  
Moscow University Physics Bulletin     Hybrid Journal  
Multibody System Dynamics     Hybrid Journal   (Followers: 1)
NANO     Hybrid Journal   (Followers: 8)
Nano Letters     Full-text available via subscription   (Followers: 52)
Nano Reviews     Open Access   (Followers: 15)
NanoBioImaging     Open Access  
Nanomechanics     Open Access  
Nanoscale and Microscale Thermophysical Engineering     Hybrid Journal   (Followers: 3)
Nanoscale Research Letters     Open Access   (Followers: 3)
Nanospectroscopy     Open Access  
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 18)
Natural Science     Open Access   (Followers: 9)
Nature Communications     Open Access   (Followers: 68)
Nature Materials     Full-text available via subscription   (Followers: 52)
Nature Physics     Full-text available via subscription   (Followers: 25)
NDT & E International     Hybrid Journal   (Followers: 17)
NEUTRINO     Open Access  
Neutron News     Hybrid Journal  
New Journal of Physics     Open Access   (Followers: 6)
Niels Bohr Collected Works     Full-text available via subscription  

  First | 1 2 3 4 5 6 | Last

Journal Cover   Modern Physics Letters B
  [SJR: 0.32]   [H-I: 29]   [0 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0217-9849 - ISSN (Online) 1793-6640
   Published by World Scientific Homepage  [120 journals]
  • The effect of oxygen vacancy on holes-induced [math] magnetism in [math]
           and [math]
    • Authors: Xiao-Xi Zheng, Dan Wang, Li-Ming Tang, Ke-Qiu Chen
      Abstract: Modern Physics Letters B, Ahead of Print.
      Using the first-principles calculations, the holes-induced [math] magnetism associated with oxygen vacancy [math] in [math] and [math] has been investigated. To obtain holes, the divalent calcium and tetravalent IVB-group ions are replaced respectively by the monovalent alkali, IB-group and trivalent III-group ions. It is found that the [math] can enhance the magnetic moment of few acceptors-doped [math], whereas it enhances the magnetic moment in most acceptor-doped [math] except for La doping. Mainly, it is because the [math] gives rise to no gap-states in [math] but generates gap-states in [math]. Based on the similar effect of [math] on the band structure in [math] or in [math] (X = Ca, Sr, Ba), we suggest that there exists a similar effect of [math] on [math] magnetism in acceptor-doped alkaline titanium (zirconium) perovskites.
      Citation: Modern Physics Letters B
      PubDate: 2015-08-27T09:00:32Z
      DOI: 10.1142/S0217984915501377
       
  • Fast physical and pseudo random number generation based on a nonlinear
           optoelectronic oscillator
    • Authors: Penghua Mu, Wei Pan, Shuiying Xiang, Nianqiang Li, Xinkai Liu, Xihua Zou
      Abstract: Modern Physics Letters B, Ahead of Print.
      High speed random number generation (RNG) utilizing a nonlinear optoelectronic oscillator (OEO) is explored experimentally. It has been found that by simply adjusting either the injected optical power or the gain of the modulator driver, low complexity dynamics such as square wave, and more complex dynamics including fully developed chaos can be experimentally achieved. More importantly, physical RNG based on high-speed-oscilloscope measurements and pseudo RNG based on post-processing are implemented in this paper. The generated bit sequences pass all the standard statistical random tests, indicating that fast physical and pseudo RNG could be achieved based on the same OEO entropy source. Our results could provide further insight into the implementation of RNG based on chaotic optical systems.
      Citation: Modern Physics Letters B
      PubDate: 2015-08-27T09:00:32Z
      DOI: 10.1142/S0217984915501420
       
  • Diameter control of carbon nanotubes using argon–acetylene mixture
           and their application as IR sensor
    • Authors: Rana Arslan Afzal, Rahat Afrin, Umair Manzoor, Arshad Saleem Bhatti, Mohammad Islam, Muhammad T. Amin, Abdulrahman A. Alazba
      Abstract: Modern Physics Letters B, Ahead of Print.
      Multi-walled carbon nanotubes (CNTs) were grown via pyrolytic chemical vapor deposition technique and explored for their infrared sensing behavior. CNT synthesis was carried out over cobalt zinc ferrite [math] catalyst nanoparticles under different gas flow conditions to control outside diameter of the nanotubes. It was found that a progressive decrease in the carbon precursor gas (acetylene in this case) from 5:1 to 9:1 (v/v) causes reduction of average CNT diameter from 85 nm to 635 nm. Growth conditions involving higher temperatures yield nanotubes/nanofibers with outer diameter of [math][math]500 nm, presumably due to surface aggregation of nanoparticles or increased flux of carbonaceous species at the catalyst surface or both. Current–voltage characteristics of the nanotubes depending on the CNT diameter, revealed linear or nonlinear behavior. When incorporated as sensing layer, the sensitivity of [math][math]5.3 was noticed with response time of [math][math]4.1 s. It is believed that IR sensing characteristics of such CNT-based detectors can be further enhanced through post-synthesis purification and chemical functionalization treatments.
      Citation: Modern Physics Letters B
      PubDate: 2015-08-24T03:15:07Z
      DOI: 10.1142/S0217984915501316
       
  • Numerical investigation on ignition and flame propagation process of
           partially covered cavity in a supersonic flow
    • Authors: Zun Cai, Zhen-Guo Wang, Ming-Bo Sun, Qing Li, Hong-Bo Wang
      Abstract: Modern Physics Letters B, Ahead of Print.
      In order to study the effect of ignition enhancement of partially covered cavity, ignition and flame propagation process of the partially covered cavity in a scramjet combustor are investigated numerically. Employing the cavity active injection, the characteristics of ignition and flame propagation of three cavity configurations are compared under inflow conditions of Ma = 2.1 with stagnation state [math] MPa, [math] K. It reveals that the cover plate of the cavity is detrimental to flame propagation but beneficial for ignition enhancement. The average static pressure and temperature of the partially covered cavity increases rapidly after ignition and the cover plate works in assembling the fuel in the corner recirculation zone. The covered region will become a fuel-rich region with high pressure and temperature, which acts as an intensified ignition source in the cavity. However, the application of cover plate in the cavity decreases the length-to-depth ratio of the cavity, restricts the flame propagation process and also decreases the thrust generated in the expansion section of the scramjet.
      Citation: Modern Physics Letters B
      PubDate: 2015-08-13T09:38:45Z
      DOI: 10.1142/S0217984915501328
       
  • Topological invariance of the Hall conductance and quantization
    • Authors: Paul Bracken
      Abstract: Modern Physics Letters B, Ahead of Print.
      It is shown that the Kubo equation for the Hall conductance can be expressed as an integral which implies quantization of the Hall conductance. The integral can be interpreted as the first Chern class of a [math] principal fiber bundle on a two-dimensional torus. This accounts for the conductance given as an integer multiple of [math]. The formalism can be extended to deduce the fractional conductivity as well.
      Citation: Modern Physics Letters B
      PubDate: 2015-08-13T09:38:42Z
      DOI: 10.1142/S0217984915501353
       
  • Characters of basic steady state solutions for superfluid Fermi gas in
           Bessel optical lattices
    • Authors: Ke-Zhi Zhang, Yan Chen, Yong-Lin He, Zheng-Lai Liu
      Abstract: Modern Physics Letters B, Ahead of Print.
      We consider a dynamical model for superfluid Fermi gas, trapped in the central well of an axially symmetric Bessel optical lattice potential. The equation includes nonlinear power-law form of the chemical potential [math], for [math]), which accounts for Fermi pressure. Reducing the equation to two-dimensional (2D) form, we obtain the basic steady state solutions of the system along the Bose–Einstein condensation (BEC) side to Bardeen–Cooper–Schrieffer (BCS) side by employing the energy balance condition, which are guided by the variational approximation. It is found that the strength [math] and the radial scale r of the Bessel optical lattice have an extreme effect on the characters of basic steady state solution. Analytically, we deduce the atomic density distribution, the average atom number and the average energy of basic steady state, where the atom distribution of the system presents on periodic change with r, and increases faster at unitarity than in the BEC limit. Furthermore, because of the Fermi pressure, the atomic density distribution at the unitarity is more extensive than that in the BEC limit. In particular, there exist very interesting changes, the average energy intends to collapse state with r, however it emerges as a stable state with varying L both in the BEC limit and at unitarity.
      Citation: Modern Physics Letters B
      PubDate: 2015-08-03T09:33:05Z
      DOI: 10.1142/S021798491550133X
       
  • First-principles study on the band structure, magnetic and elastic
           properties of half-metallic [math]
    • Authors: Santao Qi, Chuan-Hui Zhang, Bao Chen, Jiang Shen
      Abstract: Modern Physics Letters B, Ahead of Print.
      In this study, we have investigated the structural, electronic, magnetic and elastic properties of the full-Heusler [math] alloy in the framework of density functional theory with generalized gradient approximation (GGA). The calculated results showed that [math] was stable in ferrimagnetic configuration and crystallized in the [math]-type structure. From the band structure and density of states calculation results, we concluded that [math] belongs to a kind of half-metallic compound with an indirect band gap of 0.37[math]eV. Immediately thereafter, we have analyzed the origin of half-metallic band gap. The total magnetic moment of [math] at the stable state is [math] per formula unit, obeying the Slater–Pauling rule [math]. In addition, various mechanical properties have been obtained and discussed based on the three principle elastic tensor elements [math] and [math] for the first time in the present work. We expect that our calculated results may trigger the application of [math] in future spintronics field.
      Citation: Modern Physics Letters B
      PubDate: 2015-08-03T09:33:04Z
      DOI: 10.1142/S0217984915501390
       
  • Temperature diagnostic for laser-induced plasma by electron collision
           model
    • Authors: Jian He, Lamei Liao, Qingguo Zhang
      Abstract: Modern Physics Letters B, Ahead of Print.
      In this paper, using the collisions between ion and free electron, we analyze the conditions of electron collision equilibrium (ECE) for laser-induced plasma (LIP). Considering the collision excitation and de-excitation, we discuss the principle for temperature diagnostic for the three level ions for LIP. Taking the Ne[math]v ion spectral lines in infrared as an example, for the intensity ratio of the (3-2) transition to the (2-1) transition, we compare the temperature in local thermal equilibrium and electron collision equilibrium when the intensity ratio varies from 0 to 1.8, and we obtain some important conclusions. This discussion is useful in the LIP diagnostic under the conditions of electron collision equilibrium.
      Citation: Modern Physics Letters B
      PubDate: 2015-08-03T09:33:04Z
      DOI: 10.1142/S0217984915501389
       
  • Evaluation of the quality for sheet deep drawing using a
           magnetorheological fluid (MRF)
    • Authors: Feng Li, Peng Xu, Xiaochong Sui, Fujian Zhou
      Abstract: Modern Physics Letters B, Ahead of Print.
      Sealing problems, subsequent cleaning processes and poor force transmission effect etc. series of problems which strongly restrict the development and application of traditional medium pressure-based sheet forming technology. To overcome these problems, the magnetorheological fluid (MRF) can be used as the alternative force transmission medium. In this study, the deep drawing process of a 304 stainless steel sheet using MRF was investigated. The die cavity was filled with MRF and electric current was used to quantitatively adjust the magnetic fields distribution, which then controls the deformation behavior of the forming sheet. As compared to the conventional deep drawing process, experimental results clearly show that significant improvement in the produced sample quality was obtained when using the MRF with the electric current of 2[math]A. These improvements include: the height of the boundary circle reduces by 20%, the wall thickness distribution is more uniform, the rebound ratio correspondingly reduces from 9.6% to 0.67%, and the degree of sticking mode and the size precision are significantly increased. The results of this study provide scientific guidance to solve the bottleneck in the traditional deep drawing forming technology. The potential applications of the MRF-based new deep drawing technology to improve the product quality were explored.
      Citation: Modern Physics Letters B
      PubDate: 2015-08-03T09:33:03Z
      DOI: 10.1142/S0217984915501419
       
  • Vacancy induced Jahn–Teller distortion in silicon and its influence
           to the electronic structure
    • Authors: Shuying Zhong, Xueling Lei, Lang Zhou
      Abstract: Modern Physics Letters B, Ahead of Print.
      Atomic and electronic structures of monovacancy (V1), divacancy (V2) and ring hexavacancy (V6) in crystalline silicon are studied using first-principles calculations in periodic supercells. Our results show that the V6 defect is the most stable among V1, V2 and V6 defects, and the V2-RB structure is a little more stable than the V2-LP structure due to lower vacancy formation energy. Furthermore, it is found that both V1 and V2 undergo the Jahn–Teller (JT) distortion while V6 does not. As a result, V1 and V2 have deep levels in the gap which mainly come from the neighboring atoms to vacancy. V6 has tailing bands in the gap, and so has a more stable electronic structure than V1 and V2. In addition, the JT distortion also reflects in the band decomposed charge density and the difference charge density.
      Citation: Modern Physics Letters B
      PubDate: 2015-08-03T09:33:02Z
      DOI: 10.1142/S0217984915501365
       
  • Research on the band gaps of the two-dimensional Sierpinski fractal
           phononic crystals
    • Authors: Nansha Gao, Jiu Hui Wu, Li Jing
      Abstract: Modern Physics Letters B, Ahead of Print.
      In this paper, we study the band gaps (BGs) of the two-dimensional (2D) Sierpinski fractal phononic crystals (SFPGs) embedded in the homogenous matrix. The BGs structure, transmission spectra and displacement fields of eigenmodes of the proposed structures are calculated by using finite element method (FEM). Due to the simultaneous mechanisms of the Bragg scattering, the structure can exhibit low-frequency BGs, which can be effectively shifted by changing the inclusion rotation angle. The initial stress values can compress the BGs is proposed for the first time. Through the calculation, it is shown that, in the 2D solid–solid SFPG, the multi-frequency BGs exist. The whole BGs would incline to the low-frequency range with the increase of the fractal dimension. The SFPGs with different shape inclusions, can modulate the number, width and location of BGs. The study in this paper is relevant to the design of tuning BGs and isolators in the low-frequency range.
      Citation: Modern Physics Letters B
      PubDate: 2015-08-03T09:33:02Z
      DOI: 10.1142/S0217984915501341
       
  • Electron–phonon interaction in quasi-1D ternary mixed crystals of
           polar semiconductors
    • Authors: Yunpeng Fan, Junhua Hou
      Abstract: Modern Physics Letters B, Ahead of Print.
      The electron–optical-phonon interaction between an electron and two branches of LO-phonon modes in a quasi-one-dimensional ternary mixed crystal (TMC) of polar semiconductors is studied. The new electron–phonon interaction Hamiltonian including the unit-cell volume variation in TMCs is obtained by using the modified random element isodisplacement model and Born–Huang method. The energies of polaron are numerically calculated for several systems of III–V compounds. A group of III-nitride mixed crystals is also taken into numerical calculation in our theory. It is verified theoretically that the obvious nonlinearity of the polaronic energy and effective mass with the composition is essential and the unit-cell volume effects cannot be neglected except the very weak e–p coupling.
      Citation: Modern Physics Letters B
      PubDate: 2015-07-29T01:01:41Z
      DOI: 10.1142/S0217984915501304
       
  • Breathers and localized solutions of complex modified Korteweg–de
           Vries equation
    • Authors: Yue-Feng Liu, Rui Guo, Hua Li
      Abstract: Modern Physics Letters B, Ahead of Print.
      Under investigation is the complex modified Korteweg–de Vries (KdV) equation, which has many physical significance in fluid mechanics, plasma physics and so on. Via the Darboux transformation (DT) method, some breather and localized solutions are presented on two backgrounds: the continuous wave background [math] and the constant background [math]. Some figures are plotted to illustrate the dynamical features of those solutions.
      Citation: Modern Physics Letters B
      PubDate: 2015-07-29T01:01:40Z
      DOI: 10.1142/S0217984915501298
       
  • Narrow band and angle-insensitive filter based on one-dimensional photonic
           crystal containing graded-index defect
    • Authors: Bobo Xu, Gaige Zheng, Yigen Wu
      Abstract: Modern Physics Letters B, Ahead of Print.
      Using finite difference time domain (FDTD) method, we numerically investigate one-dimensional photonic crystals (1D PCs) with [math] structure, where A and B stand for different dielectric materials, and C the graded-index (GRIN) material. The transmission properties of the multilayer structure have been studied, and the results show that a tunable narrow band-pass filter (BPF) can be obtained by changing gradient coefficients of the GRIN defect layer. For an increasing incident angle, although the transmittance becomes smaller, positions of the resonant peak remain the same, which can act as the angle-insensitive filter.
      Citation: Modern Physics Letters B
      PubDate: 2015-07-29T01:01:40Z
      DOI: 10.1142/S0217984915501286
       
  • Effect of temperature on magnetic susceptibility and thermodynamic
           properties of an asymmetric quantum dot in tilted magnetic field
    • Authors: R. Khordad
      Abstract: Modern Physics Letters B, Ahead of Print.
      In this paper, the specific heat, entropy and magnetic susceptibility of an asymmetric GaAs quantum dot (QD) are studied under the influence of temperature and a tilted external magnetic field. We first calculate the analytical wave functions and energy levels using a transformation to simplify the Hamiltonian of the system. Then, we obtain the analytical expressions for specific heat, entropy and magnetic susceptibility as the function of temperature, magnetic field and its direction for various anisotropy of the system. According to the results obtained from the present work, we find that (i) the specific heat and entropy are decreased when the magnetic field increases. (ii) When anisotropy is increased, the specific heat and entropy decrease. (iii) At large magnetic fields, the anisotropy has not important effect on specific heat and entropy. In briefly, the magnetic field, magnetic field direction and anisotropy play important roles in the specific heat, entropy and magnetic susceptibility of an asymmetric QD.
      Citation: Modern Physics Letters B
      PubDate: 2015-07-29T01:01:39Z
      DOI: 10.1142/S0217984915501274
       
 
 
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