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.
Original language | English |
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Article number | 031006 |
Journal | 2D materials |
Volume | 4 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 Sep 2017 |
Keywords
- Graphene
- Quantum transport
- Strain deformations
- Theory
- Valley Hall effect