Nontrivial topology in the layered Dirac nodal-line semimetal candidate SrZnSb2 with distorted Sb square nets

Liu, Jinyu1; Liu, Pengfei2,3; Gordon, Kyle4; Emmanouilidou, Eve1; Xing, Jie1; Graf, David5; Chakoumakos, Bryan C.6; Wu, Yan6; Cao, Huibo6; Dessau, Dan4; Liu, Qihang2,3,7; Ni, Ni1

2019-11-14

10.1103/PhysRevB.100.195123

PHYSICAL REVIEW B   影响因子和分区

2469-9950

2469-9969

Dirac states hosted by Sb/Bi square nets are known to exist in the layered antiferromagnetic AMnX(2) (A = CaSr/Ba/Eu/Yb, X=Sb/Bi) material family with the space group to be P4/nmm or I4/mmm. In this paper, we present a comprehensive study of quantum transport behaviors, angle-resolved photoemission spectroscopy (ARPES), and first-principles calculations on SrZnSb2, a nonmagnetic analog to AMnX(2), which crystalizes in the pnma space group with distorted square nets. From the quantum oscillation measurements up to 35 T, three major frequencies including F-1 = 103 T, F-2 = 127 T, and F-3 = 160 T are identified. The effective masses of the quasiparticles associated with these frequencies are extracted, namely, m(1)* = 0.1 m(e), m(2)* = 0.1 m(e), and m(3)* = 0.09 m(e), where m(e) is the free electron mass. From the three band Lifshitz-Kosevich fit, the Berry phases accumulated along the cyclotron orbit of the quasiparticles are 0.06 pi, 1.2 pi, and 0.74 pi for F-1, F-2, and F-3, respectively. Combined with the ARPES data and the first-principles calculations, we reveal that F-2 and F-3 are associated with the two nontrivial Fermi pockets at the Brillouin zone edge while F-1 is associated with the trivial Fermi pocket at the zone center. In addition, the first-principles calculations further suggest the existence of a Dirac nodal line in the band structure of SrZnSb2.

SCI ; EI

英语

其他

DOE Office of Science User Facility[DE-AC02-05CH11231]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000496570600002

AMER PHYSICAL SOC

20194707726806

Antimony ; Calculations ; Electrons ; Photoelectron spectroscopy ; Quantum chemistry ; Zinc compounds

Antimony and Alloys:546.4 ; Physical Chemistry:801.4 ; Mathematics:921

PHYSICS

Web of Science

1.Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
2.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Technol, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
4.Univ Colorado, Dept Phys, Boulder, CO 80309 USA
5.Natl High Magnet Field Lab, 1800 E Paul Dirac Dr, Tallahassee, FL 32310 USA
6.Oak Ridge Natl Lab, Quantum Condensed Matter Div, POB 2009, Oak Ridge, TN 37831 USA
7.Peng Cheng Lab, Ctr Quantum Comp, Shenzhen 518055, Peoples R China

Liu, Jinyu,Liu, Pengfei,Gordon, Kyle,et al. Nontrivial topology in the layered Dirac nodal-line semimetal candidate SrZnSb2 with distorted Sb square nets[J]. PHYSICAL REVIEW B,2019,100(19).

Liu, Jinyu.,Liu, Pengfei.,Gordon, Kyle.,Emmanouilidou, Eve.,Xing, Jie.,...&Ni, Ni.(2019).Nontrivial topology in the layered Dirac nodal-line semimetal candidate SrZnSb2 with distorted Sb square nets.PHYSICAL REVIEW B,100(19).

Liu, Jinyu,et al."Nontrivial topology in the layered Dirac nodal-line semimetal candidate SrZnSb2 with distorted Sb square nets".PHYSICAL REVIEW B 100.19(2019).