Aharonov-Bohm Oscillations in Minimally Twisted Bilayer Graphene

verfasst von

C. De Beule, F. Dominguez, P. Recher

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.

Externe Organisation(en)

Technische Universität Braunschweig

Typ

Artikel

Journal

Physical review letters

Band

125

ISSN

0031-9007

Publikationsdatum

28.08.2020

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Physik und Astronomie (insg.)

Elektronische Version(en)

https://doi.org/10.1103/PhysRevLett.125.096402 (Zugang: Unbekannt)