Chirality probe of twisted bilayer graphene in the linear transport regime
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2023
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866916208892182528 |
|---|---|
| author | Bahamon, Dario A. Gómez-Santos, Guillermo Efetov, Dmitri K. Stauber, Tobias |
| author_facet | Bahamon, Dario A. Gómez-Santos, Guillermo Efetov, Dmitri K. Stauber, Tobias |
| contents | We propose minimal transport experiments in the coherent regime that can probe the chirality of twisted moiré structures. We show that only with a third contact and in the presence of an in-plane magnetic field (or other time-reversal symmetry breaking effect), a chiral system may display non-reciprocal transport in the linear regime. We then propose to use the third lead as a voltage probe and show that opposite enantiomers give rise to different voltage drops on the third lead. Additionally, in the scenario of layer-discriminating contacts, the third lead can serve as a current probe, capable of detecting different handedness even in the absence of a magnetic field. In a complementary configuration, applying opposite voltages on the two layers of the third leads gives rise to a chiral (super)current in the absence of a source-drain voltage whose direction is determined by its chirality. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_03779 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Chirality probe of twisted bilayer graphene in the linear transport regime Bahamon, Dario A. Gómez-Santos, Guillermo Efetov, Dmitri K. Stauber, Tobias Mesoscale and Nanoscale Physics We propose minimal transport experiments in the coherent regime that can probe the chirality of twisted moiré structures. We show that only with a third contact and in the presence of an in-plane magnetic field (or other time-reversal symmetry breaking effect), a chiral system may display non-reciprocal transport in the linear regime. We then propose to use the third lead as a voltage probe and show that opposite enantiomers give rise to different voltage drops on the third lead. Additionally, in the scenario of layer-discriminating contacts, the third lead can serve as a current probe, capable of detecting different handedness even in the absence of a magnetic field. In a complementary configuration, applying opposite voltages on the two layers of the third leads gives rise to a chiral (super)current in the absence of a source-drain voltage whose direction is determined by its chirality. |
| title | Chirality probe of twisted bilayer graphene in the linear transport regime |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2307.03779 |