无序衬底上二维磁化胶体的脱钉特性

利用朗之万分子动力学,数值研究无序衬底上二维磁化胶体的脱钉特性.发现衬底强度对磁化胶体的脱钉产生重要影响.随着衬底强度的提高,磁化胶体的脱钉存在从弹性到塑性的渡越.     

A δ-function-like peak in the specific heat of two-dimensional vortex lattice： Monte carlo study

A repulsive vortex-vortex interaction model was used to numerically study the melting transition of the two-dimensional vortex system with Monte Carlo method. Then a δ-function-like peak in the specific heat was observed and the internal energy showed a sharp drop at the melting temperature, whieh indicated that there exists a first-order melting transition at finite temperatures. The Lindemarm criterion was also investigated and valid, but different from previous simulation results.