Interference of chiral Andreev edge states
Journal Article (Journal Article)
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, which we refer to as chiral Andreev edge states (CAESs). These propagate along the interface in the direction determined by the magnetic field and their interference can turn an incoming electron into an outgoing electron or hole, depending on the phase accumulated by the CAESs along their path. Our results demonstrate that these excitations can propagate and interfere over a significant length, opening future possibilities for their coherent manipulation.
Full Text
Duke Authors
Cited Authors
- Zhao, L; Arnault, EG; Bondarev, A; Seredinski, A; Larson, TFQ; Draelos, AW; Li, H; Watanabe, K; Taniguchi, T; Amet, F; Baranger, HU; Finkelstein, G
Published Date
- August 1, 2020
Published In
Volume / Issue
- 16 / 8
Start / End Page
- 862 - 867
Electronic International Standard Serial Number (EISSN)
- 1745-2481
International Standard Serial Number (ISSN)
- 1745-2473
Digital Object Identifier (DOI)
- 10.1038/s41567-020-0898-5
Citation Source
- Scopus