Local manifestations of thickness dependent topology and axion edge state in topological magnet MnBi$_2$Te$_4$

no code implementations • 20 Jan 2021 • Felix Lüpke, Anh D. Pham, Yi-Fan Zhao, Ling-Jie Zhou, Wenchang Lu, Emil Briggs, Jerzy Bernholc, Marek Kolmer, Wonhee Ko, Cui-Zu Chang, Panchapakesan Ganesh, An-Ping Li

At an even-odd layer step, a localized gapped electronic state is observed, in agreement with an axion insulator edge state that results from a phase transition across the step.

Band Gap Mesoscale and Nanoscale Physics

Statistical detection of Josephson, Andreev, and single quasiparticle currents in scanning tunneling microscopy

no code implementations • 4 Dec 2020 • Wonhee Ko, Eugene F. Dumitrescu, Petro Maksymovych

We present a method to identify distinct tunneling modes in tunable superconducting tunnel junction composed of superconducting tip and sample in scanning tunneling microscope.

Superconductivity Mesoscale and Nanoscale Physics