Home > Articles > Published articles > Valley-polarized quantum transport generated by gauge fields in graphene |
Date: | 2017 |
Abstract: | We report on the possibility to simultaneously generate in graphene a bulk valley-polarized dissipative transport and a quantum valley Hall effect by combining strain-induced gauge fields and real magnetic fields. Such unique phenomenon results from a 'resonance/anti-resonance' effect driven by the superposition/cancellation of superimposed gauge fields which differently affect time reversal symmetry. The onset of a valley-polarized Hall current concomitant to a dissipative valley-polarized current flow in the opposite valley is revealed by a e²/h Hall conductivity plateau. We employ efficient linear scaling Kubo transport methods combined with a valley projection scheme to access valley-dependent conductivities and show that the results are robust against disorder. |
Grants: | European Commission 696656 Ministerio de Economía y Competitividad FIS2015- 67767-P Ministerio de Economía y Competitividad SEV-2013-0295 |
Rights: | Tots els drets reservats. |
Language: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Subject: | Graphene ; Quantum transport ; Strain deformations ; Theory ; Valley Hall effect |
Published in: | 2D Materials, Vol. 4, issue 3 (September 2017) , art. 31006, ISSN 2053-1583 |
Post-print 7 p, 4.6 MB |