Carpio A, Bonilla L L, Dell'Acqua G
Departamento de Matemática Aplicada, Universidad Complutense, Madrid 28040, Spain.
Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Sep;64(3 Pt 2):036204. doi: 10.1103/PhysRevE.64.036204. Epub 2001 Aug 14.
An analysis of wave front motion in weakly coupled doped semiconductor superlattices is presented. If a dimensionless doping is sufficiently large, the superlattice behaves as a discrete system presenting front propagation failure and the wave fronts can be described near the threshold currents J(i) (i=1,2) at which they depin and move. The wave front velocity scales with current as |J-J(i)|(1/2). If the dimensionless doping is low enough, the superlattice behaves as a continuum system and wave fronts are essentially shock waves whose velocity obeys an equal area rule.
本文对弱耦合掺杂半导体超晶格中的波前运动进行了分析。如果无量纲掺杂足够大，超晶格表现为一个呈现前沿传播失败的离散系统，并且波前可以在阈值电流(J(i))（(i = 1,2)）附近被描述，在该阈值电流处它们脱钉并移动。波前速度与电流的关系为(\vert J - J(i)\vert^{(1/2)})。如果无量纲掺杂足够低，超晶格表现为一个连续系统，并且波前本质上是冲击波，其速度遵循等面积规则。
