A local compressibility study of magic angle twisted bilayer graphene, Part 1

Andrew Pierce; Yonglong Xie; Jeong Min Park; Seung Hwan Lee; Yuan Cao; Patrick R Forrester; Eslam Khalaf; Takashi Taniguchi; Kenji Watanabe; Ashvin Vishwanath; Pablo Jarillo-Herrero; Amir Yacoby

A local compressibility study of magic angle twisted bilayer graphene, Part 1

ORAL

Abstract

Magic-angle twisted bilayer graphene (MATBG) exhibits fascinating correlated phases due to the dominance of electronic interactions within its extremely flat low-lying bands. Recent tunneling spectroscopy and magnetotransport experiments have revealed topologically insulating states with Chern number C=±1, 2, 3 at the moiré band filling factors ν=±3, 2, 1, respectively, which are predicted within a minimal model consisting of eight topological bands with C=±1. Here, we report high-resolution local compressibility measurements of MATBG using a scanning single-electron transistor. We identify incompressible states with finite Chern number, and discuss their connection to recent tunneling spectroscopy and magnetotransport results.

March 17, 2021, 10:36 AM – March 17, 2021, 10:48 AM

Presenters

Andrew Pierce

Department of Physics, Harvard University, Harvard University

Authors

Andrew Pierce

Department of Physics, Harvard University, Harvard University
Yonglong Xie

Department of Physics, Harvard University, Harvard University
Jeong Min Park

MIT, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology
Seung Hwan Lee

Department of Physics, Harvard University, Harvard University
Yuan Cao

MIT, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology
Patrick R Forrester

Department of Physics, Harvard University, Harvard University
Eslam Khalaf

Harvard University, Department of Physics, Harvard university
Takashi Taniguchi

National Institute for Materials Science, National Institute for Materials Science, Japan, National Institure for Materials Science, Advanced Materials Laboratory, National Institute for Materials Science, NIMS, National Institute of Materials Science, National Institute for Materials Science (NIMS), International Center for Materials Nanoarchitectonics, National Institute for Materials Science, National Institute for Materials Science,1-1 Namiki, National Institute of Material Science, National Institute for Materials Science, Tsukuba, Japan, International Center for Materials Nanoarchitectonics, NIMS, Research Center for Functional Materials, National Institute for Materials Science, National Institute of Materials Science, Tsukuba, Japan, National Institude for Materials Science, International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba 305-0044, Japan, International Center for Materials Nanoarchitectonics, National Institute for Materials, NIMS - Japan, National Institute for Materials Science ,Japan, National Institute for Materials Science, Tsukuba, 305-0044, Ibaraki, Japan, National Institute for Material Science, National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Material Science Japan, 8International Center for Materials Nanoarchitectonics, NIMS Tsukuba, National Institute for Materials Science: Namiki, Tsukuba, Ibaraki, JP, National Institue for Material Science, National Institute for Materials Science,1-1 Namiki, Tsukuba, 305-0044, Japan, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, Research Center for Functional Materials, National In, Research Center for Functional Materials, Japan, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan, International Center for Material Nanoarchitectonics, National Institute for Materials Science, International Center for Materials Nanoarchitectonics, NIMS Suguba, NIMS, Tsukuba, Japan, National Cheng Kung University, National Institute for Materials Science, Namiki 1-1, Tsukuba, 305-0044, Ibaraki, Japan, National institute of material science, Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan, Advanced Materials Laboratory, NIMS, National Institute for Materials Science, International Center for Materials Nanoarchitectonics, National Institute of Material Science, Japan, Tsukuba, National Institute for Materials Science
Kenji Watanabe

National Institute for Materials Science, National Institute for Materials Science, Japan, National Institure for Materials Science, Advanced Materials Laboratory, National Institute for Materials Science, NIMS, National Institute of Materials Science, National Institute for Materials Science (NIMS), Research Center for Functional Materials, National Institute for Materials Science, National Institute for Materials Science,1-1 Namiki, National Institute of Material Science, National Institute for Materials Science, Tsukuba, Japan, Research Center for Functional Materials, NIMS, National Institute of Materials Science, Tsukuba, Japan, National Institude for Materials Science, National Institute for Materials Science, Tsukuba, Ibaraki, Japan, Research Center for Functional Materials, National Institute for Materials Science, Tsukuba 305-0044, Japan, International Center for Materials Nanoarchitectonics, National Institute for Materials, NIMS - Japan, National Institute for Materials Science ,Japan, National Institute for Materials Science, Tsukuba, 305-0044, Ibaraki, Japan, National Institute for Material Science, National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Material Science Japan, NIMS Tsukuba, National Institute for Materials Science, Research Center for Functional Materials, Japan, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Materials Science: Namiki, Tsukuba, Ibaraki, JP, National Institue for Material Science, National Institute for Materials Science,1-1 Namiki, Tsukuba, 305-0044, Japan, Materials, NIMS, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, Research Center for Functional Materials, National In, Research Center for Functional Materials, Japan, International Center for Materials Nanoarchitectonics, National Institute for Materials Science, International Center for Materials nanoarchtectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan, NIMS Suguba, NIMS, Tsukuba, Japan, National Institute for Materials Science, Namiki 1-1, Tsukuba, 305-0044, Ibaraki, Japan, National institute of material science, Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan, Advanced Materials Laboratory, NIMS, Research Center for Functional Materials, National Institute for Materials Science, Ibaraki, Japan, National Institute for Materials Science, Research Center for Functional Materials, National Institute of Material Science, Japan, Tsukuba, National Institute for Materials Science
Ashvin Vishwanath

Harvard University, Department of Physics, Harvard University, Department of Physics and Astronomy, Harvard University, Department of Physics, Harvard university
Pablo Jarillo-Herrero

MIT, Massachusetts Institute of Technology MIT, Department of Physics, Massachusetts Institute of Technology, Massachusetts Institute of Technology, Physics, Massachusetts Institute of Technology
Amir Yacoby

Department of Physics, Harvard University, Harvard University