Details
| Original language | English |
|---|---|
| Article number | 096402 |
| Journal | Physical review letters |
| Volume | 125 |
| Issue number | 9 |
| Publication status | Published - 28 Aug 2020 |
| Externally published | Yes |
Abstract
We investigate transport in the network of valley Hall states that emerges in minimally twisted bilayer graphene under interlayer bias. To this aim, we construct a scattering theory that captures the network physics. In the absence of forward scattering, symmetries constrain the network model to a single parameter that interpolates between one-dimensional chiral zigzag modes and pseudo-Landau levels. Moreover, we show how the coupling of zigzag modes affects magnetotransport. In particular, we find that scattering between parallel zigzag channels gives rise to Aharonov-Bohm oscillations that are robust against temperature, while coupling between zigzag modes propagating in different directions leads to Shubnikov-de Haas oscillations that are smeared out at finite temperature.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical review letters, Vol. 125, No. 9, 096402, 28.08.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Aharonov-Bohm Oscillations in Minimally Twisted Bilayer Graphene
AU - De Beule, C.
AU - Dominguez, F.
AU - Recher, P.
N1 - Funding information: F. D. and P. R. gratefully acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within the framework of Germany’s Excellence Strategy—EXC-2123 QuantumFrontiers—390837967.
PY - 2020/8/28
Y1 - 2020/8/28
N2 - We investigate transport in the network of valley Hall states that emerges in minimally twisted bilayer graphene under interlayer bias. To this aim, we construct a scattering theory that captures the network physics. In the absence of forward scattering, symmetries constrain the network model to a single parameter that interpolates between one-dimensional chiral zigzag modes and pseudo-Landau levels. Moreover, we show how the coupling of zigzag modes affects magnetotransport. In particular, we find that scattering between parallel zigzag channels gives rise to Aharonov-Bohm oscillations that are robust against temperature, while coupling between zigzag modes propagating in different directions leads to Shubnikov-de Haas oscillations that are smeared out at finite temperature.
AB - We investigate transport in the network of valley Hall states that emerges in minimally twisted bilayer graphene under interlayer bias. To this aim, we construct a scattering theory that captures the network physics. In the absence of forward scattering, symmetries constrain the network model to a single parameter that interpolates between one-dimensional chiral zigzag modes and pseudo-Landau levels. Moreover, we show how the coupling of zigzag modes affects magnetotransport. In particular, we find that scattering between parallel zigzag channels gives rise to Aharonov-Bohm oscillations that are robust against temperature, while coupling between zigzag modes propagating in different directions leads to Shubnikov-de Haas oscillations that are smeared out at finite temperature.
UR - http://www.scopus.com/inward/record.url?scp=85090904497&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.125.096402
DO - 10.1103/PhysRevLett.125.096402
M3 - Article
C2 - 32915621
AN - SCOPUS:85090904497
VL - 125
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 9
M1 - 096402
ER -