Signatures of Fermi Arcs in the Quasiparticle Interferences of the Weyl Semimetals TaAs and NbP
學年 104
學期 2
出版（發表）日期 2016-02-10
作品名稱 Signatures of Fermi Arcs in the Quasiparticle Interferences of the Weyl Semimetals TaAs and NbP
作品名稱（其他語言）
著者 Guoqing Chang; Su-Yang Xu; Hao Zheng; Chi-Cheng Lee; Shin-Ming Huang; Ilya Belopolski; Daniel S. Sanchez; Guang Bian; Nasser Alidoust; Tay-Rong Chang; Chuang-Han Hsu; Horng-Tay Jeng; Arun Bansil; Hsin Lin; M. Zahid Hasan
單位
出版者
著錄名稱、卷期、頁數 Phys. Rev. Lett. 116, 066601
摘要 The recent discovery of the first Weyl semimetal in TaAs provides the first observation of a Weyl fermion in nature. Such a topological semimetal features a novel type of anomalous surface state, the Fermi arc, which connects a pair of Weyl nodes through the boundary of the crystal. Here, we present theoretical calculations of the quasiparticle interference (QPI) patterns that arise from the surface states including the topological Fermi arcs in the Weyl semimetals TaAs and NbP. Most importantly, we discover that the QPI exhibits termination points that are fingerprints of the Weyl nodes in the interference pattern. Our results, for the first time, propose a universal interference signature of the topological Fermi arcs in TaAs, which is fundamental for scanning tunneling microscope (STM) measurements on this prototypical Weyl semimetal compound. More generally, our work provides critical guideline and methodology for STM studies on new Weyl semimetals. Further, the scattering channels revealed by our QPIs are broadly relevant to surface transport and device applications based on Weyl semimetals.
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語言 en_US
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 USA
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/987654321/117359 )