SUPR
Exploring topological insulators for interferometry
Dnr:

NAISS 2025/22-75

Type:

NAISS Small Compute

Principal Investigator:

Sergey Ignatenko

Affiliation:

Linköpings universitet

Start Date:

2025-01-23

End Date:

2026-02-01

Primary Classification:

10304: Condensed Matter Physics

Webpage:

Allocation

Abstract

Topological insulators are state of quantum matter, characterized by an electrically insulating interior and a conductive surface. This property offers robustness against impurities, beneficial for quantum information processing, though not yet explored for electronic device applications. In this project, a pair of constrictions connected in series is studied as an interferometer device. This device can probe electron wave properties, quantum coherence time, external strain, and ambient temperature. Electron transport and thermodynamic properties are calculated using the recursive Green’s function method. For realistic system parameters and sizes, it requires computational resources beyond those of a desktop computer. The results will provide fundamental insights into the physics of topological insulators and potential applications such as electronic interferometers.