Spin Texture in Type-II Weyl Semimetal WTe2
Baojie Feng, Yang-Hao Chan, Ya Feng, Ro-Ya Liu, Mei-Yin Chou, Kenta, Kuroda, Koichiro Yaji, Ayumi Harasawa, Paolo Moras, Alexei Barinov, Walid G., Malaeb, Cedric Bareille, Takeshi Kondo, Shik Shin, Fumio Komori, Tai-Chang, Chiang, Youguo Shi, Iwao Matsuda
TL;DR
This study uses SARPES and first-principles calculations to analyze the spin texture of WTe2, supporting its classification as a type-II Weyl semimetal and shedding light on its magnetoresistance properties.
Contribution
It provides the first detailed spin-resolved band structure and confirms the spin polarization of surface and bulk states in WTe2.
Findings
Spin polarization observed in Fermi arc surface states
Spin polarization in bulk Fermi pockets confirmed
Supports WTe2 as a type-II Weyl semimetal candidate
Abstract
We determine the band structure and spin texture of WTe2 by spin- and angle-resolved photoemission spectroscopy (SARPES). With the support of first-principles calculations, we reveal the existence of spin polarization of both the Fermi arc surface states and bulk Fermi pockets. Our results support WTe2 to be a type-II Weyl semimetal candidate and provide important information to understand its extremely large and nonsaturating magnetoresistance.
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