Abstract
| Original language | English |
|---|---|
| Journal | Physical Review B |
| Volume | 98 |
| Issue number | 3 |
| DOIs | |
| State | Published - 2018 |
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Multiple topologically nontrivial bands in noncentrosymmetric YSn2. / Zhu, Y.; Zhang, T.; Hu, J.; Kidd, J.; Graf, D.; Gui, X.; Xie, W.; Zhu, M.; Ke, X.; Cao, H.; Fang, Z.; Weng, H.; Mao, Z.
In: Physical Review B, Vol. 98, No. 3, 2018.Research output: Contribution to journal › Article
TY - JOUR
T1 - Multiple topologically nontrivial bands in noncentrosymmetric YSn2
AU - Zhu, Y.
AU - Zhang, T.
AU - Hu, J.
AU - Kidd, J.
AU - Graf, D.
AU - Gui, X.
AU - Xie, W.
AU - Zhu, M.
AU - Ke, X.
AU - Cao, H.
AU - Fang, Z.
AU - Weng, H.
AU - Mao, Z.
N1 - cited By 0
PY - 2018
Y1 - 2018
N2 - 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. \ 2018 American Physical Society.
AB - 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. \ 2018 American Physical Society.
U2 - 10.1103/PhysRevB.98.035117
DO - 10.1103/PhysRevB.98.035117
M3 - Article
VL - 98
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 2469-9950
IS - 3
ER -