Intersubband Landau Level Couplings Induced by In-Plane Magnetic Fields in Trilayer Graphene

We observed broken-symmetry quantum Hall effects and level crossings between spin- and valley- resolved Landau levels (LLs) in Bernal stacked trilayer graphene. When the magnetic field was tilted with respect to the sample normal from 0° to 66°, the LL crossings formed at intersections of zeroth and...

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Bibliographic Details
Published in:Physical review letters 2017-11, Vol.119 (18), p.186802-186802, Article 186802
Main Authors: Asakawa, Yuta, Masubuchi, Satoru, Inoue, Naoko, Morikawa, Sei, Watanabe, Kenji, Taniguchi, Takashi, Machida, Tomoki
Format: Article
Language:English
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Summary:We observed broken-symmetry quantum Hall effects and level crossings between spin- and valley- resolved Landau levels (LLs) in Bernal stacked trilayer graphene. When the magnetic field was tilted with respect to the sample normal from 0° to 66°, the LL crossings formed at intersections of zeroth and second LLs from monolayer-graphene-like and bilayer-graphene-like subbands, respectively, exhibited a sequence of transitions. The results indicate the LLs from different subbands are coupled by in-plane magnetic fields (B_{∥}), which was explained by developing the tight-binding model Hamiltonian of trilayer graphene under B_{∥}.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.119.186802