Electric field effects in Fibonacci superlaticces

TL;DR

This paper investigates how homogeneous electric fields influence the transmission and localization of electronic states in Fibonacci superlattices, revealing significant modifications in spectral fragmentation and carrier localization.

Contribution

It provides a comprehensive analysis of electric field effects on Fibonacci superlattices using transfer matrix formalism, highlighting field-induced localization phenomena.

Findings

Electric fields alter the spectral fragmentation pattern.

Electric fields induce localization of carriers.

Effects become more pronounced with longer systems.

Abstract

We present a throughout study of transmission and localization properties of Fibonacci superlattices, both in flat band conditions and subject to homogeneous electric fields perpendicular to the layers. We use the transfer matrix formalism to determine the transmission coefficient and the degree of localization of the electronic states. We find that the fragmentation pattern of the electronic spectrum is strongly modified when the electric field is switched on, this effect being more noticeable as the system length increases. We relate those phenomena to field-induced localization of carriers in Fibonacci superlattices.