Thermoelectric Properties of Electrostatically Tunable Antidot Lattices

TL;DR

This paper presents a novel electrostatically tunable antidot lattice device that allows independent control of potential and Fermi energy, enabling detailed mapping of the potential landscape through thermopower measurements.

Contribution

It introduces a device that uses electrostatic gating to independently tune antidot potential and Fermi energy, with applications in mapping potential landscapes.

Findings

Observation of well-defined commensurability features in magnetoresistance

Thermopower effectively maps the antidot potential landscape

Device demonstrates independent control of potential and Fermi energy

Abstract

We report on the fabrication and characterization of a device which allows the formation of an antidot lattice (ADL) using only electrostatic gating. The antidot potential and Fermi energy of the system can be tuned independently. Well defined commensurability features in magnetoresistance as well as magnetothermopower are obsereved. We show that the thermopower can be used to efficiently map out the potential landscape of the ADL.