Spontaneous time-reversal symmetry breaking in twisted double bilayer graphene

Manabendra Kuiri; Christopher Coleman; Zhenxiang Gao; Aswin Vishnuradhan; Kenji Watanabe; Takashi Taniguchi; Jihang Zhu; Allan H. MacDonald; Joshua Folk

doi:10.1038/s41467-022-34192-x

Nature Communications (Oct 2022)

Spontaneous time-reversal symmetry breaking in twisted double bilayer graphene

Manabendra Kuiri,
Christopher Coleman,
Zhenxiang Gao,
Aswin Vishnuradhan,
Kenji Watanabe,
Takashi Taniguchi,
Jihang Zhu,
Allan H. MacDonald,
Joshua Folk

Affiliations

Manabendra Kuiri: Department of Physics and Astronomy & Stewart Blusson Quantum Matter Institute, University of British Columbia
Christopher Coleman: Department of Physics and Astronomy & Stewart Blusson Quantum Matter Institute, University of British Columbia
Zhenxiang Gao: Department of Physics and Astronomy & Stewart Blusson Quantum Matter Institute, University of British Columbia
Aswin Vishnuradhan: Department of Physics and Astronomy & Stewart Blusson Quantum Matter Institute, University of British Columbia
Kenji Watanabe: Research Center for Functional Materials, National Institute for Materials Science
Takashi Taniguchi: International Center for Materials Nanoarchitectonics, National Institute for Materials Science
Jihang Zhu: Physics Department, University of Texas at Austin
Allan H. MacDonald: Physics Department, University of Texas at Austin
Joshua Folk: Department of Physics and Astronomy & Stewart Blusson Quantum Matter Institute, University of British Columbia

DOI: https://doi.org/10.1038/s41467-022-34192-x
Journal volume & issue: Vol. 13, no. 1
pp. 1 – 6

Abstract

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Twisted double bilayer graphene (tDBG) comprises two Bernal-stacked bilayer graphene sheets with a twist between them. Here, the authors report a strong anomalous Hall effect in the correlated-metal regime of tDBG, indicating time reversal symmetry breaking from orbital ferromagnetism, likely associated with valley polarization.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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