搜索结果: 76-90 共查到“知识库 晶体学”相关记录422条 . 查询时间(2.973 秒)
Density of states in random lattices with translational invariance
Density of states random lattices with translational invariance
2010/11/22
We propose a random matrix approach to describe vibrational excitations in disordered systems.
The dynamical matrix M is taken in the form M = AAT where A is some real (not generally
symmetric) rand...
Effect of hydrogen on the microstructure evolution of nanocrystalline silicon
Effect of hydrogen microstructure evolution of nanocrystalline silicon
2010/11/22
We investigated the effect of dissolved hydrogen on the microstructure evolution of anocrystalline silicon. Through molecular dynamics simulations we characterize the local and overall structural feat...
Competition between supersolid phases and magnetisation plateaux in the frustrated easy-axis antiferromagnet on a triangular lattice
Competition supersolid phases magnetisation plateaux frustrated easy-axis antiferromagnet
2010/11/22
The majority of magnetic materials possess some degree of magnetic anisotropy, either at the level of a single ion, or in the exchange interactions between di erent magnetic ions. Where these exchange...
Dynamic Stimulation of Quantum Coherence in Lattice Bosons
Dynamic Stimulation Quantum Coherence in Lattice Bosons
2010/11/19
Thermal fluctuations tend to destroy long-range phase correlations. Consequently, bosons in a lattice will undergo a transition from a phase-coherent superfluid as the temperature rises. Contrary to c...
A theoretical perspective on the glass transition and nonequilibrium phenomena in disordered materials
theoretical perspective glass transition nonequilibrium phenomena disordered materials
2010/11/22
We provide a theoretical perspective on the glass transition in molecular liquids at thermal equi-librium, on the spatially heterogeneous and aging dynamics of disordered materials, and on the rheolog...
We review several models of glassy systems where the randomness is self generated, i.e. already
an in nitesimal amount of disorder is sucient to cause a transition to a non-ergodic, glassy state.We ...
Nucleon strange quark content from two-flavor lattice QCD with exact chiral symmetry
Nucleon strange quark content two-flavor lattice QCD exact chiral symmetry
2011/1/13
Strange quark content of the nucleon hN|¯ss|Ni is calculated in dynamical lattice QCD employing the overlap fermion formulation. For this quantity, exact chiral symmetry guaranteed by the Ginspar...
Diffusion-limited reactions on a two-dimensional lattice with binary disorder
Diffusion-limited reactions two-dimensional lattice with binary disorder
2010/11/19
Reaction-diffusion systems where transition rates exhibit quenched disorder are common in physical and chemical systems. We study pair reactions on a periodic two-dimensional lattice, including contin...
Enhancing Ionic Conductivity of Bulk Single Crystal Yttria-Stabilized Zirconia by Tailoring Dopant Distribution
Ionic Conductivity of Bulk Single Crystal Dopant Distribution
2010/11/19
We present an ab-initio based kinetic Monte Carlo model for ionic conductivity in single crystal yttria-stabilized zirconia. Ionic interactions are taken into account by combining density functional t...
Tunable Vibrational Band Gaps in One-Dimensional Diatomic Granular Crystals with Three-Particle Unit Cells
Tunable Vibrational Band Gaps One-Dimensional Diatomic Granular Three-Particle Unit Cells
2010/11/18
We investigate the tunable vibration filtering properties of one-dimensional diatomic granular crystals composed of arrays of stainless steel spheres and cylinders interacting via Hertzian contact. Th...
Crystallization of the Lewis-Wahnström ortho-terphenyl model
Crystallization Lewis-Wahnströ m ortho-terphenyl model
2010/11/19
Crystallization is observed during long molecular dynamics simulations of bent trimers, a molecular model proposed by Lewis and Wahnstrom for ortho-terphenyl. In the crystal, the three spheres that m...
Forward-backward asymmetry AFB is an essential observable to study the nature of coupling in the standard model (SM) and physics beyond the SM, as shown at LEP and Tevatron.
Exploring quark transverse momentum distributions with lattice QCD
Exploring quark transverse momentum distributions lattice QCD
2011/1/13
We discuss in detail a method to study transverse momentum dependent parton distribution
functions (TMDs) using lattice QCD. To develop the formalism and to obtain rst numerical results,we directly ...
Reentrant and Isostructural Transitions in a Cluster-Crystal Former
Reentrant and Isostructural Transitions Cluster-Crystal Former
2010/11/18
We study the low-temperature behavior of a simple cluster-crystal forming system through simulation.The phase behavior is found to be hybrid between the Gaussian core and penetrable
sphere models. Th...
Single crystal growth of BaFe$_{2-x}$Co$_x$As$_2$ without fluxing agent
Single crystal growth fluxing agent
2010/11/18
We report a simple, reliable method to grow high quality BaFe2−xCoxAs2 single crystal samples
without using any fluxing agent. The starting materials for the single crystal growth come from
we...