Prediction of an arc-tunable Weyl Fermion metallic state in MoxW1-xTe2
學年 104
學期 2
出版（發表）日期 2016-02-15
作品名稱 Prediction of an arc-tunable Weyl Fermion metallic state in MoxW1-xTe2
作品名稱（其他語言）
著者 Tay-Rong Chang; Su-Yang Xu; Guoqing Chang; Chi-Cheng Lee; Shin-Ming Huang; BaoKai Wang; Guang Bian; Hao Zheng; Daniel S. Sanchez; Ilya Belopolski; Nasser Alidoust; Madhab Neupane; Arun Bansil; Horng-Tay Jeng; Hsin Lin; M. Zahid Hasan
單位
出版者
著錄名稱、卷期、頁數 Nature Communications 7, 10639
摘要 A Weyl semimetal is a new state of matter that hosts Weyl fermions as emergent quasiparticles. The Weyl fermions correspond to isolated points of bulk band degeneracy, Weyl nodes, which are connected only through the crystal’s boundary by exotic Fermi arcs. The length of the Fermi arc gives a measure of the topological strength, because the only way to destroy the Weyl nodes is to annihilate them in pairs in the reciprocal space. To date, Weyl semimetals are only realized in the TaAs class. Here, we propose a tunable Weyl state in MoxW1−xTe2 where Weyl nodes are formed by touching points between metallic pockets. We show that the Fermi arc length can be changed as a function of Mo concentration, thus tuning the topological strength. Our results provide an experimentally feasible route to realizing Weyl physics in the layered compound MoxW1−xTe2, where non-saturating magneto-resistance and pressure-driven superconductivity have been observed.
關鍵字
語言 en
ISSN
期刊性質 國外
收錄於 SCI
產學合作
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審稿制度 是
國別 GBR
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出版型式 ,電子版
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/117358 )