论文标题
一维晶格模型中的位错偶极子
A dislocation-dipole in one dimensional lattice model
论文作者
论文摘要
与位错偶极子相对应的平衡家族，在两个符号的两个位错之间有可变的分离，在一个维晶格模型中构建。找到了连接该家庭某些成员的合适路径，表现出熟悉的Peierls浮雕。已经提出了一种用于能量变化的景观，以突出这些平衡之间的某些顺序跃迁，从与紧密相关的Frenkel-Kontorova模型的角度来看，从准静态分离的一对相反符号的脱位的解释。为分段 - 季度电位的情况提供了封闭形式的表达式，其中包括对中间旋转区域的效果的分析。
A family of equilibria corresponding to dislocation-dipole, with variable separation between the two dislocations of opposite sign, is constructed in a one dimensional lattice model. A suitable path connecting certain members of this family is found which exhibits the familiar Peierls relief. A landscape for the variation of energy has been presented to highlight certain sequential transition between these equilibria that allows an interpretation in terms of quasi-statically separating pair of dislocations of opposite sign from the viewpoint of closely related Frenkel-Kontorova model. Closed form expressions are provided for the case of a piecewise-quadratic potential wherein an analysis of the effect of an intermediate spinodal region is included.
