Professor Tomoki Machida and Project Associate Professor Satoru Masubuchi, in collaboration with a research group led by Professor Kyoko Ishizaka of the Graduate School of Engineering, have succeeded in the first direct observation of the electronic structure of a two-dimensional material. This time, they developed a sample preparation method for angle-resolved photoelectron spectroscopy that can be adapted to more complex atomic layer flake samples, and directly observed the electronic structure of 2- to 5-layer WTe2 for the first time. This will lead to the development of research on the physical properties of stacked materials made from ultimately thin atomic layer flakes, such as the clarification that different electronic structures are formed in 2- to 5-layer WTe2 depending on the even-oddness of the number of layers. The joint research group also includes Associate Professor Takao Sasagawa of the Tokyo Institute of Technology, Fellow Takashi Taniguchi of the National Institute for Materials Science, and Professor Ryotaro Arita of the University of Tokyo. The resulting paper was published in the online edition of Physical Review Research on June 27.
[Link]
[Machida Lab]