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Multiple Topologically Nontrivial Bands In Noncentrosymmetric Ysn2

Title: Multiple Topologically Nontrivial Bands In Noncentrosymmetric Ysn2.
Name(s): Zhu, Yanglin, author
Zhang, Tiantian, author
Hu, Jin, author
Kidd, Jamin, author
Graf, David, author
Gui, Xin, author
Xie, Weiwei, author
Zhu, Mengze, author
Ke, Xianglin, author
Cao, Huibo, author
Fang, Zhong, author
Weng, Hongming, author
Mao, Zhiqiang, author
Type of Resource: text
Genre: Journal Article
Journal Article
Date Issued: 2018-07-16
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The square lattices formed by main-group elements such as Bi, Sb, Sn, and Si in layered materials have attracted a lot of interest, since they can create rich topological phases. In this paper, we report the slightly distorted square lattice of Sn in a noncentrosymmetric compound YSn2 generates multiple topologically nontrivial bands, one of which likely hosts a nodal line and tunable Weyl semimetal state induced by the Rashba spin-orbit coupling and proper external magnetic field. The quasiparticles described as relativistic fermions from these bands are manifested by nearly zero mass and nontrivial Berry phases probed in de Haas-van Alphen (dHvA) oscillations. The dHvA study also reveals YSn2 has a complicated Fermi surface, consisting of several three-dimensional (3D) and one 2D pocket. Our first-principles calculations show the pointlike 3D pocket at Y point on the Brillouin zone boundary hosts the possible Weyl state. Our findings establish YSn2 as a new interesting platform for observing novel topological phases and studying their underlying physics.
Identifier: FSU_libsubv1_wos_000438674700001 (IID), 10.1103/PhysRevB.98.035117 (DOI)
Keywords: berrys phase, arcs, discovery, magnetoresistance, ultrahigh mobility, metals, dirac semimetal cd3as2, points, tap, weyl fermion
Publication Note: The publisher’s version of record is available at
Persistent Link to This Record:
Owner Institution: FSU
Is Part Of: Physical Review B.
Issue: iss. 3, vol. 98

Choose the citation style.
Zhu, Y., Zhang, T., Hu, J., Kidd, J., Graf, D., Gui, X., … Mao, Z. (2018). Multiple Topologically Nontrivial Bands In Noncentrosymmetric Ysn2. Physical Review B. Retrieved from