Valley-Polarized Quantum Transport Generated by Gauge Fields in Graphene
| Autor: | Settnes, Mikkel, García, José Hugo, Roche, Stephan |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | 2D Mater. 4 031006, (2017) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/2053-1583/aa7cbd |
| Popis: | We report on the possibility to simultaneously generate in graphene a {\it bulk valley-polarized dissipative transport} and a {\it 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 $e^2/h$ 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. Comment: 2D Materials (accepted for publication) |
| Databáze: | arXiv |
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