Observation of the layer dependent electronic structures in atomically thin WTe<sub>2</sub> flakes

Yuma Tanaka; Satoru Masubuchi; Masato Sakano; Atsushi Oshima; Takuya Nomoto; Ryotaro Arita; Shota Okazaki; Takao Sasagawa; Kenji Watanabe; Takashi Taniguchi; Tomoki Machida; Kyoko Ishizaka

Observation of the layer dependent electronic structures in atomically thin WTe<sub>2</sub> flakes

ORAL

Abstract

In our study, by using micro-focused laser angle-resolved photoemission spectroscopy (ARPES) in combination with the 2D materials manufacturing system (2DMMS) that can freely stack atomic layers by image recognition, machine learning, and autonomous robotic assembly, we developed a high-throughput procedure for investigating the band dispersions of atomically thin micro-flakes. We prepared 2D WTe₂ flake samples for ARPES by using the Graphite / h-BN as a substrate and by encapsulating with graphene. We successfully observed the thickness-dependent band structures of the atomically thin WTe₂flakes. This sample fabrication procedure for ARPES should be applicable to a wide range of micro-flakes samples, such as heterostructures and twisted materials.

March 16, 2021, 10:48 AM – March 16, 2021, 11:00 AM

Presenters

Yuma Tanaka

University of Tokyo

Authors

Yuma Tanaka

University of Tokyo
Satoru Masubuchi

University of Tokyo
Masato Sakano

University of Tokyo
Atsushi Oshima

University of Tokyo
Takuya Nomoto

Univ Tokyo, University of Tokyo, Univ of Tokyo, Department of Applied Physics, Univ of Tokyo, Department of Applied Physics, The University of Tokyo, Department of Applied Physics, University of Tokyo
Ryotaro Arita

Univ of Tokyo, University of Tokyo, Department of Applied Physics, Univ of Tokyo, CEMS, RIKEN, Department of Applied Physics, The University of Tokyo, RIKEN-CEMS
Shota Okazaki

Tokyo Institute of Technology
Takao Sasagawa

Materials and Structure Laboratory, Tokyo Institute of Technology, Tokyo Institute of Technology, Laboratory for Materials and Structures, Tokyo Institute of Technology
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
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
Tomoki Machida

University of Tokyo
Kyoko Ishizaka

the University of Tokyo, University of Tokyo