Surface structure of novel semimetal WTe2

Kazuaki Kawahara, Zeyuan Ni, Ryuichi Arafune, Tetsuroh Shirasawa, Chun-Liang Lin, Emi Minamitani, Satoshi Watanabe, Maki Kawai, Noriaki Takagi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We investigate the atomic structure of the tungsten ditelluride (WTe2) surface by using low-energy electron diffraction (LEED), scanning tunneling microscopy, and density functional theory (DFT) calculations. From the LEED and DFT analyses, we find small but non-negligible surface relaxation that gradually decays in an oscillatory manner inside the first WTe2 layer. In addition, the DFT calculations reveal that the Fermi surface topology is sensitive to this relaxation. These results are helpful for understanding the exotic properties of WTe2.

Original languageEnglish
Article number045702
JournalApplied Physics Express
Volume10
Issue number4
DOIs
StatePublished - 1 Apr 2017

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