Using nonlocal surface transport to identify the axion insulator

摘要

Abstract available in English only.

We propose a nonlocal surface-transport device that distinguishes an axion insulator from a normal insulator without requiring a precise measurement of half-quantized surface Hall conductance. The signal remains robust when gapless side surfaces and disorder are included, and thick electrodes can improve the feasibility of measurements in MnBi2Te4 films.