淡江大學機構典藏:Item 987654321/117347
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 62797/95867 (66%)
Visitors : 3741385      Online Users : 531
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/117347


    Title: New type of Weyl semimetal with quadratic double Weyl fermions
    Authors: Huang, Shin-Ming;Xu, Su-Yang;Belopolski, Ilya;Lee, Chi-Cheng;Changa, Guoqing;Chang, Tay-Rong;Wang, BaoKai;Alidoust, Nasser;Bian, Guang;Neupane, Madhab;Sanchez, Daniel;Zheng, Hao;Jeng, Horng-Tay;Bansil, Arun;Neupert, Titus;Lin, Hsin;Hasan, M. Zahid
    Keywords: topological insulator;Weyl fermion;Fermi arc;chiral magnetic effect
    Date: 2016-01-19
    Issue Date: 2019-10-10 12:10:16 (UTC+8)
    Publisher: National Academy of Sciences
    Abstract: Weyl semimetals have attracted worldwide attention due to their wide range of exotic properties predicted in theories. The experimental realization had remained elusive for a long time despite much effort. Very recently, the first Weyl semimetal has been discovered in an inversion-breaking, stoichiometric solid TaAs. So far, the TaAs class remains the only Weyl semimetal available in real materials. To facilitate the transition of Weyl semimetals from the realm of purely theoretical interest to the realm of experimental studies and device applications, it is of crucial importance to identify other robust candidates that are experimentally feasible to be realized. In this paper, we propose such a Weyl semimetal candidate in an inversion-breaking, stoichiometric compound strontium silicide, SrSi2, with many new and novel properties that are distinct from TaAs. We show that SrSi2 is a Weyl semimetal even without spin–orbit coupling and that, after the inclusion of spin–orbit coupling, two Weyl fermions stick together forming an exotic double Weyl fermion with quadratic dispersions and a higher chiral charge of ±2. Moreover, we find that the Weyl nodes with opposite charges are located at different energies due to the absence of mirror symmetry in SrSi2, paving the way for the realization of the chiral magnetic effect. Our systematic results not only identify a much-needed robust Weyl semimetal candidate but also open the door to new topological Weyl physics that is not possible in TaAs.
    Relation: PNAS 113, 1180
    DOI: 10.1073/pnas.1514581113
    Appears in Collections:[Graduate Institute & Department of Physics] Journal Article

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML194View/Open
    New type of Weyl semimetal with quadratic double Weyl fermions.pdf1030KbAdobe PDF1View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.


    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback