Please use this identifier to cite or link to this item: https://doi.org/10.1038/s41598-018-28644-y
Title: Tunable double-Weyl Fermion semimetal state in the SrSi2 materials class
Authors: Singh B. 
Chang G.
Chang T.-R.
Huang S.-M.
Su C. 
Lin M.-C.
Lin H.
Bansil A. 
Issue Date: 2018
Publisher: Nature Publishing Group
Citation: Singh B., Chang G., Chang T.-R., Huang S.-M., Su C., Lin M.-C., Lin H., Bansil A. (2018). Tunable double-Weyl Fermion semimetal state in the SrSi2 materials class. Scientific Reports 8 (1) : 10540. ScholarBank@NUS Repository. https://doi.org/10.1038/s41598-018-28644-y
Abstract: We discuss first-principles topological electronic structure of noncentrosymmetric SrSi2 materials class based on the hybrid exchange-correlation functional. Topological phase diagram of SrSi2 is mapped out as a function of the lattice constant with focus on the semimetal order. A tunable double-Weyl Fermion state in Sr1-x Ca x Si2 and Sr1-x Ba x Si2 alloys is identified. Ca doping in SrSi2 is shown to yield a double-Weyl semimetal with a large Fermi arc length, while Ba doping leads to a transition from the topological semimetal to a gapped insulator state. Our study indicates that SrSi2 materials family could provide an interesting platform for accessing the unique topological properties of Weyl semimetals. © 2018 The Author(s).
Source Title: Scientific Reports
URI: http://scholarbank.nus.edu.sg/handle/10635/152562
ISSN: 20452322
DOI: 10.1038/s41598-018-28644-y
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