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

Abstract

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 P 4 / n m m or I 4 / m m m . In this paper, we present a comprehensive study of quantum transport behaviors, angle-resolved photoemission spectroscopy (ARPES), and first-principles calculations on SrZnSb 2 , a nonmagnetic analog to AMnX 2 , which crystalizes in the p n m a space group with distorted square nets. Furthermore, 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 π , 1.2 π , and 0.74 π for F 1 , F 2 , and F 3 , respectively. Finally, 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 SrZnSb 2 .

Authors:
 [1];  [2];  [3];  [1];  [1];  [4]; ORCiD logo [5]; ORCiD logo [5]; ORCiD logo [5];  [3];  [6];  [1]
  1. Univ. of California, Los Angeles, CA (United States)
  2. Southern Univ. of Science and Technology, Shenzhen (China). Shenzhen Inst. for Quantum Science and Technology
  3. Univ. of Colorado, Boulder, CO (United States)
  4. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. Southern Univ. of Science and Technology, Shenzhen (China). Shenzhen Inst. for Quantum Science and Technology; Peng Cheng Lab., Shenzhen (China). Center for Quantum Computing
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Guangdong Innovative and Entrepreneurial Research Team Program
OSTI Identifier:
1651254
Grant/Contract Number:  
AC05-00OR22725; SC0011978; DMR-1644779; FG02-03ER46066; AC02-05CH11231; 2017ZT07C062; 2019B030301001
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 19; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Classical transport; electrical conductivity; Fermi surface; Landau levels; magnetotransport; spin-orbit coupling; topological materials

Citation Formats

Liu, Jinyu, Liu, Pengfei, Gordon, Kyle, Emmanouilidou, Eve, Xing, Jie, Graf, David, Chakoumakos, Bryan C., Wu, Yan, Cao, Huibo, Dessau, Dan, Liu, Qihang, and Ni, Ni. Nontrivial topology in the layered Dirac nodal-line semimetal candidate SrZnSb2 with distorted Sb square nets. United States: N. p., 2019. Web. https://doi.org/10.1103/physrevb.100.195123.
Liu, Jinyu, Liu, Pengfei, Gordon, Kyle, Emmanouilidou, Eve, Xing, Jie, Graf, David, Chakoumakos, Bryan C., Wu, Yan, Cao, Huibo, Dessau, Dan, Liu, Qihang, & Ni, Ni. Nontrivial topology in the layered Dirac nodal-line semimetal candidate SrZnSb2 with distorted Sb square nets. United States. https://doi.org/10.1103/physrevb.100.195123
Liu, Jinyu, Liu, Pengfei, Gordon, Kyle, Emmanouilidou, Eve, Xing, Jie, Graf, David, Chakoumakos, Bryan C., Wu, Yan, Cao, Huibo, Dessau, Dan, Liu, Qihang, and Ni, Ni. Thu . "Nontrivial topology in the layered Dirac nodal-line semimetal candidate SrZnSb2 with distorted Sb square nets". United States. https://doi.org/10.1103/physrevb.100.195123. https://www.osti.gov/servlets/purl/1651254.
@article{osti_1651254,
title = {Nontrivial topology in the layered Dirac nodal-line semimetal candidate SrZnSb2 with distorted Sb square nets},
author = {Liu, Jinyu and Liu, Pengfei and Gordon, Kyle and Emmanouilidou, Eve and Xing, Jie and Graf, David and Chakoumakos, Bryan C. and Wu, Yan and Cao, Huibo and Dessau, Dan and Liu, Qihang and Ni, Ni},
abstractNote = {Dirac states hosted by Sb/Bi square nets are known to exist in the layered antiferromagnetic AMnX2 (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 AMnX2, which crystalizes in the pnma space group with distorted square nets. Furthermore, from the quantum oscillation measurements up to 35 T, three major frequencies including F1=103T, F2=127T, and F3=160T are identified. The effective masses of the quasiparticles associated with these frequencies are extracted, namely, m1*=0.1 me, m2*=0.1 me, and m3*=0.09 me, where me is the free electron mass. From the three band Lifshitz-Kosevich fit, the Berry phases accumulated along the cyclotron orbit of the quasiparticles are 0.06π, 1.2π, and 0.74π for F1, F2, and F3, respectively. Finally, combined with the ARPES data and the first-principles calculations, we reveal that F2 and F3 are associated with the two nontrivial Fermi pockets at the Brillouin zone edge while F1 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.},
doi = {10.1103/physrevb.100.195123},
journal = {Physical Review B},
number = 19,
volume = 100,
place = {United States},
year = {2019},
month = {11}
}

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