| Issue |
EPL
Volume 103, Number 2, July 2013
|
|
|---|---|---|
| Article Number | 27006 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/103/27006 | |
| Published online | 14 August 2013 | |
Specular Andreev reflection in inversion-symmetric Weyl semimetals
1 National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University Nanjing 210093, China
2 National Center of Microstructures and Quantum Manipulation, Nanjing University - Nanjing 210093, China
(a) shen@nju.edu.cn
Received: 17 June 2013
Accepted: 20 July 2013
The electron-hole conversion at the normal-metal superconductor interface in inversion-symmetric Weyl semimetals is investigated with an effective two-band model. We find that the specular Andreev reflection of Weyl fermions has two unusual features. The Andreev conductance for s-wave BCS pairing states is anisotropic, depending on the angle between the line connecting a pair of Weyl points and the normal of the junction, due to opposite chirality carried by the paired electrons. For the Fulde-Ferrell-Larkin-Ovchinnikov pairing states, the Andreev reflection spectrum is isotropic and is independent of the finite momentum of the Cooper pairs.
PACS: 74.45.+c – Proximity effects; Andreev reflection; SN and SNS junctions / 73.23.-b – Electronic transport in mesoscopic systems
© EPLA, 2013
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