首页|Field induced Chern insulating states in twisted monolayer-bilayer graphene

Field induced Chern insulating states in twisted monolayer-bilayer graphene

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Unraveling the mechanism underlying topological phases,notably the Chem insulators(ChIs)in strong correlated systems at the microscopy scale,has captivated significant research interest.Nonetheless,ChIs harboring topological information have not always manifested themselves,owing to the constraints imposed by displacement fields in certain ex-perimental configurations.In this study,we employ density-tuned scanning tunneling microscopy(DT-STM)to investigate the ChIs in twisted monolayer-bilayer graphene(tMBG).At zero magnetic field,we observe correlated metallic states.While under a magnetic field,a metal-insulator transition happens and an integer ChI is formed emanating from the filling index s=3 with a Chem number C=1.Our results underscore the pivotal role of magnetic fields as a powerful probe for elucidating topological phases in twisted Van der Waals heterostructures.

Chern insulatorsstrong correlation effectstwo-dimensional van der Waals heterostructuredensity-tuned scanning tunneling microscopy(DT-STM)

王政文、韩英卓、Kenji Watanabe、Takashi Taniguchi、姜宇航、毛金海

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School of Physical Science and CAS Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100049,China

College of Materials Science and Optoelectronic Technology,Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

Advanced Materials Laboratory,National Institute for Materials Science,Tsukuba 305-0044,Japan

2024

10.1088/1674-1056/ad3b8a

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(6)
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