Conductivity oscillations in 2D superlattice with non-harmonical dispersion law under non-quantizing electric and magnetic fields (in Russian)

TL;DR

This paper investigates conductivity oscillations in a 2D superlattice with non-harmonic dispersion under crossed electric and magnetic fields, revealing oscillatory behavior, negative conductivity, and temperature effects.

Contribution

It provides a theoretical calculation of current density and conductivity oscillations in a superlattice with parabolic miniband under non-quantizing fields, including new insights into negative conductivity.

Findings

Conductivity oscillations with magnetic field dependence

Possibility of negative absolute conductivity

Temperature causes smearing of peaks

Abstract

We calculate the current density in a semiconductor superlattice with parabolic miniband under crossed non-quantizing electric and magnetic fields. The Corbino disk geometry is considered. The current-voltage curve contains oscillations with period proportional to the magnetic field. The possibility is shown of the negative absolute conductivity. The Ampere-Gauss characteristics also contain overshoots under high enough electric fields. In all cases, the peaks smear with temperature rising.