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Magnetic Field-Stabilized Wigner Crystal States in a Graphene Moiré Superlattice.
Chen, Guorui; Zhang, Ya-Hui; Sharpe, Aaron; Zhang, Zuocheng; Wang, Shaoxin; Jiang, Lili; Lyu, Bosai; Li, Hongyuan; Watanabe, Kenji; Taniguchi, Takashi; Shi, Zhiwen; Goldhaber-Gordon, David; Zhang, Yuanbo; Wang, Feng.
Afiliação
  • Chen G; Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
  • Zhang YH; Department of Physics, University of California at Berkeley, Berkeley, California 94720, United States.
  • Sharpe A; Department of Physics, Harvard University, Cambridge, Massachusetts 02138, United States.
  • Zhang Z; Department of Applied Physics, Stanford University, Stanford, California 94305, United States.
  • Wang S; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States.
  • Jiang L; Quantum and Electronic Materials Department, Sandia National Laboratories, Livermore, California 94550, United States.
  • Lyu B; Department of Physics, University of California at Berkeley, Berkeley, California 94720, United States.
  • Li H; Department of Physics, University of California at Berkeley, Berkeley, California 94720, United States.
  • Watanabe K; Department of Physics, University of California at Berkeley, Berkeley, California 94720, United States.
  • Taniguchi T; Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
  • Shi Z; Department of Physics, University of California at Berkeley, Berkeley, California 94720, United States.
  • Goldhaber-Gordon D; Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
  • Zhang Y; International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
  • Wang F; Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
Nano Lett ; 23(15): 7023-7028, 2023 Aug 09.
Article em En | MEDLINE | ID: mdl-37474137
ABSTRACT
ABC-stacked trilayer graphene on boron nitride (ABC-TLG/hBN) moiré superlattices provides a tunable platform for exploring Wigner crystal states in which the electron correlation can be controlled by electric and magnetic fields. Here we report the observation of magnetic field-stabilized Wigner crystal states in a ABC-TLG/hBN. We show that correlated insulating states emerge at multiple fractional and integer fillings corresponding to ν = 1/3, 2/3, 1, 4/3, 5/3, and 2 electrons per moiré lattice site under a magnetic field. These correlated insulating states can be attributed to generalized Mott states for the integer fillings and generalized Wigner crystal states for the fractional fillings. The generalized Wigner crystal states are stabilized by a vertical magnetic field and are strongest at one magnetic flux quantum per three moiré superlattices. The ν = 2 insulating state persists up to 30 T, which can be described by a Mott-Hofstadter transition at a high magnetic field.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article