Bovenzi, N. and Breitkreiz, M. and Baireuther, P. and O'Brien, T. E. and Tworzydło, J. and Adagideli, İnanç and Beenakker, C. W. J. (2017) Chirality blockade of Andreev reflection in a magnetic Weyl semimetal. Physical Review B: Condensed Matter and Materials Physics, 96 (3). ISSN 2469-9950 (Print) 2469-9969 (Online)
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Official URL: http://dx.doi.org/10.1103/PhysRevB.96.035437
Abstract
A Weyl semimetal with broken time-reversal symmetry has a minimum of two species of Weyl fermions, distinguished by their opposite chirality, in a pair of Weyl cones at opposite momenta +/- K that are displaced in the direction of the magnetization. Andreev reflection at the interface between a Weyl semimetal in the normal state (N) and a superconductor (S) that pairs +/- K must involve a switch of chirality, otherwise it is blocked. We show that this "chirality blockade" suppresses the superconducting proximity effect when the magnetization lies in the plane of the NS interface. A Zeeman field at the interface can provide the necessary chirality switch and activate Andreev reflection.
| Item Type: | Article |
|---|---|
| Subjects: | Q Science > QC Physics Q Science > QC Physics > QC176-176.9 Solids. Solid state physics |
| Divisions: | Faculty of Engineering and Natural Sciences > Basic Sciences > Physics Faculty of Engineering and Natural Sciences |
| Depositing User: | İnanç Adagideli |
| Date Deposited: | 09 Sep 2017 20:54 |
| Last Modified: | 09 Sep 2017 20:54 |
| URI: | https://research.sabanciuniv.edu/id/eprint/33794 |
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