THE FORMATION AND PROPAGATION OF DOMAINS IN SUPERLATTICES DISCUSSED WITH NONLINEAR SCHR¨ODINGER EQUATION

Abstract

The formation and propagation of domains in superlattices are discussed using a nonlinear Schrdinger equation.Negative differential conductivity in superlattices leads to the growth of inevitable spatial fluctuations,and a propagating electron accumulation-layer domain is formed.It is shown that envelopes of the wave functions are governed by the nonlinear Schrdinger equation which has soliton solutions.