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arXiv · 1709.08401

Inter-subband Landau level couplings induced by in-plane magnetic fields in trilayer graphene

Yuta Asakawa·Satoru Masubuchi·Naoko Inoue·Sei Morikawa·Kenji Watanabe·Takashi Taniguchi·Tomoki Machida
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Abstract

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 sample normal from $0^{\circ}$ to $66^\circ$, 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 ($B_{\parallel}$), which was explained by developing the tight-binding model Hamiltonian of trilayer graphene under $B_{\parallel}$.

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Yuta Asakawa, Satoru Masubuchi, Naoko Inoue, Sei Morikawa, Kenji Watanabe, Takashi Taniguchi, Tomoki Machida. 2017-09-25. Inter-subband Landau level couplings induced by in-plane magnetic fields in trilayer graphene. https://doi.org/10.1103/physrevlett.119.186802

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