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Slizovskiy S, Garcia-Ruiz A, Berdyugin A, Xin N, Taniguchi T, Watanabe K, Geim AK, Drummond ND, Fal’ko V. Out-of-Plane Dielectric Susceptibility of Graphene in Twistronic and Bernal Bilayers. Nano Lett 2021; 21:6678-6683. [PMID: 34296602 PMCID: PMC8361429 DOI: 10.1021/acs.nanolett.1c02211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 07/14/2021] [Indexed: 05/27/2023]
Abstract
We describe how the out-of-plane dielectric polarizability of monolayer graphene influences the electrostatics of bilayer graphene-both Bernal (BLG) and twisted (tBLG). We compare the polarizability value computed using density functional theory with the output from previously published experimental data on the electrostatically controlled interlayer asymmetry potential in BLG and data on the on-layer density distribution in tBLG. We show that monolayers in tBLG are described well by polarizability αexp = 10.8 Å3 and effective out-of-plane dielectric susceptibility ϵz = 2.5, including their on-layer electron density distribution at zero magnetic field and the interlayer Landau level pinning at quantizing magnetic fields.
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Affiliation(s)
- Sergey Slizovskiy
- National
Graphene Institute, University of Manchester, Booth St.E., M13 9PL Manchester, U.K.
- Dept.
of Physics & Astronomy, University of
Manchester, Manchester M13 9PL, U.K.
| | - Aitor Garcia-Ruiz
- National
Graphene Institute, University of Manchester, Booth St.E., M13 9PL Manchester, U.K.
- Dept.
of Physics & Astronomy, University of
Manchester, Manchester M13 9PL, U.K.
| | - Alexey
I. Berdyugin
- National
Graphene Institute, University of Manchester, Booth St.E., M13 9PL Manchester, U.K.
- Dept.
of Physics & Astronomy, University of
Manchester, Manchester M13 9PL, U.K.
| | - Na Xin
- National
Graphene Institute, University of Manchester, Booth St.E., M13 9PL Manchester, U.K.
- Dept.
of Physics & Astronomy, University of
Manchester, Manchester M13 9PL, U.K.
| | - Takashi Taniguchi
- National
Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Kenji Watanabe
- National
Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Andre K. Geim
- National
Graphene Institute, University of Manchester, Booth St.E., M13 9PL Manchester, U.K.
- Dept.
of Physics & Astronomy, University of
Manchester, Manchester M13 9PL, U.K.
| | - Neil D. Drummond
- Department
of Physics, Lancaster University, Lancaster LA1 4YB, U.K.
| | - Vladimir
I. Fal’ko
- National
Graphene Institute, University of Manchester, Booth St.E., M13 9PL Manchester, U.K.
- Dept.
of Physics & Astronomy, University of
Manchester, Manchester M13 9PL, U.K.
- Henry
Royce Institute for Advanced Materials, Manchester M13 9PL, U.K.
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