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説明:

We have investigated broken-symmetry quantum Hall (QH) states and their transitions with the interplay of the relative strength of valley, spin and layer polarizations in twisted bilayer graphene. The energy gaps for the low energy broken-symmetry QH states show an electron-hole asymmetric behaviour but with an opposite polarity for even and odd filling factor states. These results strongly suggest that the QH states with broken valley and spin symmetries for individual layer become hybridized via interlayer tunnelling and the hierarchy of QH states is sensitive to both magnetic field and displacement field due to charge imbalance between layers.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Twisted bilayer graphene, quantum Hall effect, spin symmetry

刊行年月日: 2016-12-01

出版者: Springer Science and Business Media LLC

掲載誌:

• Scientific Reports (ISSN: 20452322) vol. 6 issue. 1 38068

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1038/srep38068

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更新時刻: 2025-02-28 16:31:03 +0900

MDRでの公開時刻: 2025-02-28 16:31:03 +0900