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26 April 2024 |
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Andreev reflection at the edge of a two-dimentional semimetal | | A. Kononov
; S.V. Egorov
; Z. D. Kvon
; N. N. Mikhailov
; S. A. Dvoretsky
; E.V. Deviatov
; | | Date: |
25 Nov 2015 | | Abstract: | We investigate electron transport through the interface between a niobium
superconductor and the edge of a two-dimensional semimetal, realized in a 20~nm
wide HgTe quantum well. Experimentally, we observe that typical behavior of a
single Andreev contact is complicated by both a pronounced zero-bias resistance
anomaly and shallow subgap resistance oscillations with $1/n$ periodicity.
These results are demonstrated to be independent of the superconducting
material and should be regarded as specific to a 2D semimetal in a proximity
with a superconductor. We interpret these effects to originate from the
Andreev-like correlated process at the edge of a two-dimensional semimetal. | | Source: | arXiv, 1511.8085 | | Services: | Forum | Review | PDF | Favorites | |
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