Regensburg 2022 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 54: Poster Wednesday: 2D Materials 2

O 54.8: Poster

Mittwoch, 7. September 2022, 18:00–20:00, P4

Towards Shot-Noise Spectroscopy of Majorana Modes in 2D Systems — •Jan Cuperus, Floris Kooij, and Ingmar Swart — Condensed Matter & Interfaces, Utrecht University, Utrecht, The Netherlands

The quasiparticles known as Majorana zero modes (MZMs) are particles that have the peculiar properties to be their own antiparticle and to obey non-Abelian statistics. Because of the latter, MZMs are predicted to be the building blocks of topological quantum computing. Over the past years, many signatures of what could be MZMs have been reported. Examples are the end modes of 1D atomic line defects in ML FeSe [1], or the edge modes found on CrBr3 island grown on NbSe2 [2]. Conclusive observations are however, still to be made. One reason for this is the similarity of MZMs to other (close-to-)zero-energy states, e.g. Yu-Shiba-Rusinov states or Andreev bound states. Scanning tunnelling microscopy (STM) has already shown to be a key tool in the field of condensed matter physics because of its extreme spatial resolution and spectroscopic abilities. Via a new STM-based tool, namely shot-noise spectroscopy, we aim to provide a new point of view onto the matter of MZMs.

References: [1]Chen et al., Nat. Phys., 16, 536-540 (2018) [2]Kezilebieke et al., Nature, 588, 424-428 (2020)