Interference of chiral Andreev edge states

The search for topological excitations such as Majorana fermions has spurred interest in the boundaries between distinct quantum states. Here, we explore an interface between two prototypical phases of electrons with conceptually different ground states: the integer quantum Hall insulator and the s-...

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Published in:arXiv.org 2023-12
Main Authors: Zhao, Lingfei, Arnault, Ethan G, Bondarev, Alexey, Seredinski, Andrew, Larson, Trevyn, Draelos, Anne W, Li, Hengming, Watanabe, Kenji, Taniguchi, Takashi, Amet, François, Baranger, Harold U, Finkelstein, Gleb
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Electrons
Excitation
Fermions
Interference
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container_title arXiv.org
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creator Zhao, Lingfei
Arnault, Ethan G
Bondarev, Alexey
Seredinski, Andrew
Larson, Trevyn
Draelos, Anne W
Li, Hengming
Watanabe, Kenji
Taniguchi, Takashi
Amet, François
Baranger, Harold U
Finkelstein, Gleb
description The search for topological excitations such as Majorana fermions has spurred interest in the boundaries between distinct quantum states. Here, we explore an interface between two prototypical phases of electrons with conceptually different ground states: the integer quantum Hall insulator and the s-wave superconductor. We find clear signatures of hybridized electron and hole states similar to chiral Majorana fermions, to which we refer as chiral Andreev edge states (CAES). They propagate along the interface in the direction determined by magnetic field and their interference can turn an incoming electron into an outgoing electron or a hole, depending on the phase accumulated by the CAES along their path. Our results demonstrate that these excitations can propagate and interfere over a significant length, opening future possibilities for their coherent manipulation.
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subjects Electrons
Excitation
Fermions
Interference
title Interference of chiral Andreev edge states
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