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arXiv · 2506.11256

Antichiral edge states and Bogoliubov Fermi surfaces in a two-dimensional proximity-induced superconductor

Gabriel F. Rodríguez Ruiz·Juan Herrera Mateos·Leandro Tosi·Christoph Strunk·Carlos Balseiro·Liliana Arrachea
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Abstract

We show that a magnetic field parallel to the plane of a two-dimensional electron gas with Rashba spin orbit coupling in proximity to a superconductor leads to a topological phase in coexistence with a single pair of Bogoliubov Fermi surfaces. This phase hosts antichiral edge states of co-propagating Majorana fermions and are spatially localized at the opposite edges of the sample, perpendicular to the magnetic field. We discuss the characteristic signatures in the current-phase relation of a Josephson junction formed by two reservoirs in the topological phase.

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Gabriel F. Rodríguez Ruiz, Juan Herrera Mateos, Leandro Tosi, Christoph Strunk, Carlos Balseiro, Liliana Arrachea. 2025-06-12. Antichiral edge states and Bogoliubov Fermi surfaces in a two-dimensional proximity-induced superconductor. https://doi.org/10.1103/z1xc-trf1

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