Discovery of a new type of topological Weyl fermion semimetal state in MoxW1-xTe2
學年 105
學期 1
出版（發表）日期 2016-12-05
作品名稱 Discovery of a new type of topological Weyl fermion semimetal state in MoxW1-xTe2
作品名稱（其他語言）
著者 Ilya Belopolski; Daniel S. Sanchez; Yukiaki Ishida; Xingchen Pan; Peng Yu; Su-Yang Xu; Guoqing Chang; Tay-Rong Chang; Hao Zheng; Nasser Alidoust; Guang Bian; Madhab Neupane; Shin-Ming Huang; Chi-Cheng Lee; You Song; Haijun Bu; Guanghou Wang; Shisheng Li; Goki Eda; Horng-Tay Jeng; Takeshi Kondo; Hsin Lin; Zheng Liu; Fengqi Song; Shik Shin;M. Zahid Hasan
單位
出版者
著錄名稱、卷期、頁數 Nature Communications 7, 13643
摘要 The recent discovery of a Weyl semimetal in TaAs offers the first Weyl fermion observed in nature and dramatically broadens the classification of topological phases. However, in TaAs it has proven challenging to study the rich transport phenomena arising from emergent Weyl fermions. The series MoxW1−xTe2 are inversion-breaking, layered, tunable semimetals already under study as a promising platform for new electronics and recently proposed to host Type II, or strongly Lorentz-violating, Weyl fermions. Here we report the discovery of a Weyl semimetal in MoxW1−xTe2 at x=25%. We use pump-probe angle-resolved photoemission spectroscopy (pump-probe ARPES) to directly observe a topological Fermi arc above the Fermi level, demonstrating a Weyl semimetal. The excellent agreement with calculation suggests that MoxW1−xTe2 is a Type II Weyl semimetal. We also find that certain Weyl points are at the Fermi level, making MoxW1−xTe2 a promising platform for transport and optics experiments on Weyl semimetals.
關鍵字 Electronic properties and materials;Topological matter
語言 en
ISSN
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 是
國別 GBR
公開徵稿
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/987654321/117386 )