Microwave Signature of Topological Andreev level Crossings in a Bismuth-based Josephson Junction
A. Murani, B. Dassonneville, A. Kasumov, J. Basset, M. Ferrier, R. Deblock, S. Guéron, H. Bouchiat
DOI 10.1103/PhysRevLett.122.076802 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Demonstrating the topological protection of Andreev states in Josephson junctions is an experimental challenge. In particular the telltale 4π periodicity expected for the current phase relation has remained elusive, because of fast parity breaking processes. It was predicted that low temperature ac susceptibility measurements could reveal the topological protection of quantum spin Hall edge states by probing their low energy Andreev spectrum at finite frequency. We have performed such a microwave probing of a phase-biased Josephson junction built around a bismuth nanowire, a predicted second order topological insulator, and which was previously shown to host one-dimensional ballistic edge states. We find absorption peaks at the Andreev level crossings, whose temperature and frequency dependencies point to protected topological crossings with an accuracy limited by the electronic temperature of our experiment.
Similar papers
Direct Microwave Measurement of Andreev-Bound-State Dynamics in a Semiconductor-Nanowire Josephson Junction
similarity 0.91M. Hays et al.
Source status unknown — claims are unverified
Fingerprint of topological Andreev bound states in phase-dependent heat transport
similarity 0.90Björn Sothmann & Ewelina M. Hankiewicz
Source status unknown — claims are unverified
Microwave signatures of topological superconductivity in planar Josephson junctions
similarity 0.90Barış Pekerten et al.
Source status unknown — claims are unverified
Microwave spectroscopy of Josephson junctions in topological superconductors
similarity 0.89Pauli Virtanen & Patrik Recher
Source status unknown — claims are unverified
Microwave Andreev bound state spectroscopy in a semiconductor-based Planar Josephson junction
similarity 0.89Bassel Heiba Elfeky et al.
Source status unknown — claims are unverified
Magnetoelectrically tunable Andreev bound state spectra and spin polarization in p-wave Josephson junctions
similarity 0.89Maria Teresa Mercaldo et al.
Source status unknown — claims are unverified