17 Result(s)
within
Jian-Sheng Wang
Physics
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Article
Open AccessTransport in electron-photon systems
We review the description and modeling of transport phenomena among the electron systems coupled via scalar or vector photons. It consists of three parts. The first part is about scalar photons, i.e., Coulomb ...
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Article
Geometric effect on near-field heat transfer analysis using efficient graphene and nanotube models
Following the recent research enthusiasm on the effect of geometry on near-field heat transfer (NFHT) enhancement, we present an analysis based on simplified yet highly efficient graphene and nanotube models....
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Article
Three-terminal normal-superconductor junction as thermal transistor
We propose a thermal transistor based on a three-terminal normal-superconductor junction with superconductor terminal acting as the base. The emergence of heat amplification is due to the negative differentia...
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Article
Strong electron–phonon interaction and colossal magnetoresistance in EuTiO3
At low temperatures, EuTiO3 system has very large resistivities and exhibits colossal magnetoresistance. Based on a first principle calculation and the dynamical mean-field theory for small polaron we have calcu...
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Article
Nonequilibrium Green’s function method for quantum thermal transport
This review deals with the nonequilibrium Green’s function (NEGF) method applied to the problems of energy transport due to atomic vibrations (phonons), primarily for small junction systems. We present a pedag...
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Article
Cumulants of heat transfer across nonlinear quantum systems
We consider thermal conduction across a general nonlinear phononic junction. Based on two-time observation protocol and the nonequilibrium Green’s function method, heat transfer in steady-state regimes is stu...
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Article
Phonon Hall effect in ionic crystals in the presence of static magnetic field
We study phonon Hall effect (PHE) for ionic crystals in the presence of static magnetic field. Using Green-Kubo formula, we present an exact calculation of thermal conductivity tensor by considering both posi...
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Article
Modeling generalized stacking faults in Au using the tight-binding potential combined with a simulated annealing method
The tight-binding potential combined with a simulated annealing method is used to study the generalized stacking fault (GSF) structure and corresponding energy of gold. The potential is chosen to fit band stru...
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Chapter
Internal Hydrogen-induced Embrittlement in Iron Single Crystals
A thermodynamic model for internal hydrogen-induced embrittlement (HIE) in single crystals is proposed. The model is based on the assumption that the ductile versus brittle transition is controlled by the comp...
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Article
Transition Matrix Monte Carlo Method
We present a formalism of the transition matrix Monte Carlo method. A stochastic matrix in the space of energy can be estimated from Monte Carlo simulation. This matrix is used to compute the density of states...
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Chapter and Conference Paper
Ising Relaxation Dynamics: Series Expansion and Monte Carlo Simulation
The critical relaxation of the 2D Ising model is studied by series expansion in time t and by Monte Carlo simulation. Estimates from a 12-th order series Padé analysis for the dynamical critical exponent are comp...
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Article
Anisotropic finite-size scaling analysis of a two-dimensional driven diffusive system
The standard two-dimensional uniformly driven diffusive model is simulated extensively for much larger systems with a multi-spin coding technique. The nonequilibrium phase transition is analyzed with anisotrop...
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Chapter
New monte carlo methods for improved efficiency of computer simulations in statistical mechanics
In this paper, we have reviewed two complementary new approaches to improve the accuracy and efficiency of Monte Carlo computer simulations in the study of phase transitions. Substantial gains have already bee...
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Chapter
New Monte Carlo Methods for Improved Efficiency of Computer Simulations in Statistical Mechanics
In the past few years, new approaches to Monte Carlo simulations have produced substantial improvements in efficiency for both simulation and data analysis. This paper reviews recent developments in simulation...
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Article
Computer simulation of driven diffusive systems with exchanges
The field-driven Kawasaki model with a fractionp admixture of Glauber dynamics is studied by computer simulation:p=0 corresponds to the order-parameter-onserving driven diffusive system, whilep=1 is the equilibri...
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Article
Finite-size effects at critical points with anisotropic correlations: Phenomenological scaling theory and Monte Carlo simulations
Various thermal equilibrium and nonequilibrium phase transitions exist where the correlation lengths in different lattice directions diverge with different exponentsv ‖,v ⊥: uniaxial Lifshitz points, the Kawasaki...
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Article
Phase transitions and universality in nonequilibrium steady states of stochastic Ising models
We present results of direct computer simulations and of Monte Carlo renormalization group (MCRG) studies of the nonequilibrium steady states of a spin system with competing dynamics and of the voter model. Th...
