Details
| Original language | English |
|---|---|
| Article number | 195410 |
| Journal | Physical Review B |
| Volume | 104 |
| Issue number | 19 |
| Publication status | Published - 8 Nov 2021 |
| Externally published | Yes |
Abstract
Keywords
- cond-mat.mes-hall
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B, Vol. 104, No. 19, 195410, 08.11.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Network model and four-terminal transport in minimally twisted bilayer graphene
AU - Beule, Christophe De
AU - Dominguez, Fernando
AU - Recher, Patrik
N1 - Publisher Copyright: © 2021 American Physical Society.
PY - 2021/11/8
Y1 - 2021/11/8
N2 - We construct a two-channel scattering model for the triangular network of valley Hall states in interlayer-biased minimally twisted bilayer graphene from symmetry arguments and investigate electronic transport in a four-terminal setup. When the network hosts chiral zigzag modes, Aharonov-Bohm resonances appear in the longitudinal conductance in the presence of a perpendicular magnetic field or an in-plane electric field. Interestingly, we find that when both a magnetic field and an in-plane electric field are applied, resonances of different zigzag branches are split, which is sensitive to the direction of the electric field. We further demonstrate that while the Hall response vanishes in the chiral zigzag regime, a finite Hall response is obtained without destroying the Aharonov-Bohm resonances in the longitudinal response, by weakly coupling different zigzag branches, which also gives rise to Hofstadter physics at realistic magnetic fields.
AB - We construct a two-channel scattering model for the triangular network of valley Hall states in interlayer-biased minimally twisted bilayer graphene from symmetry arguments and investigate electronic transport in a four-terminal setup. When the network hosts chiral zigzag modes, Aharonov-Bohm resonances appear in the longitudinal conductance in the presence of a perpendicular magnetic field or an in-plane electric field. Interestingly, we find that when both a magnetic field and an in-plane electric field are applied, resonances of different zigzag branches are split, which is sensitive to the direction of the electric field. We further demonstrate that while the Hall response vanishes in the chiral zigzag regime, a finite Hall response is obtained without destroying the Aharonov-Bohm resonances in the longitudinal response, by weakly coupling different zigzag branches, which also gives rise to Hofstadter physics at realistic magnetic fields.
KW - cond-mat.mes-hall
UR - http://www.scopus.com/inward/record.url?scp=85119098529&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.104.195410
DO - 10.1103/PhysRevB.104.195410
M3 - Article
VL - 104
JO - Physical Review B
JF - Physical Review B
SN - 2469-9969
IS - 19
M1 - 195410
ER -