Skipping orbits and enhanced resistivity in large-diameter InAs/GaSb antidot lattices

TL;DR

This study explores the magnetotransport behavior of large-diameter InAs/GaSb antidot lattices, revealing classical orbit effects and oscillations that deepen understanding of electron dynamics in such nanostructures.

Contribution

It demonstrates the presence of rosetta-type orbits causing a broad maximum in resistivity, supported by classical calculations and phase space analysis.

Findings

Identification of a broad classical maximum at 2.5 T

Observation of weak 1/B-periodic oscillations at low temperatures

Confirmation of rosetta-type orbits encircling antidots

Abstract

We investigated the magnetotransport properties of high-mobility InAs/GaSb antidot lattices. In addition to the usual commensurability features at low magnetic field we found a broad maximum of classical origin around 2.5 T. The latter can be ascribed to a class of rosetta type orbits encircling a single antidot. This is shown by both a simple transport calculation based on a classical Kubo formula and an analysis of the Poincare surface of section at different magnetic field values. At low temperatures we observe weak 1/B-periodic oscillations superimposed on the classical maximum.