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Article overview
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Surface superconductivity in a three-dimensional Cd$_3$As$_2$ semimetal | O.O. Shvetsov
; V.D. Esin
; A.V. Timonina
; N.N. Kolesnikov
; E.V. Deviatov
; | Date: |
6 Nov 2018 | Abstract: | We experimentally investigate charge transport through a single planar
junction between Cd$_3$As$_2$ Dirac semimetal and a normal Au lead. For
non-superconducting bulk Cd$_3$As$_2$ samples, we observe non-Ohmic $dV/dI(V)$
curves, which strongly resemble standard Andreev reflection with well-defined
superconducting gap. Andreev-like behavior is demonstrated for Cd$_3$As$_2$
samples with different surface and contact preparation techniques. We connect
this behavior with surface superconductivity due to the flat-band formation in
Cd$_3$As$_2$, which has been predicted theoretically. The conclusion on
superconductivity is also supported by the gap suppression by magnetic fields
or temperature. | Source: | arXiv, 1811.2475 | Services: | Forum | Review | PDF | Favorites |
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