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Title: Absence of Dirac states in BaZnBi 2 induced by spin-orbit coupling

Abstract

We report magnetotransport properties of BaZnBi2 single crystals. Whereas electronic structure features Dirac states, such states are removed from the Fermi level by spin-orbit coupling (SOC) and consequently electronic transport is dominated by the small hole and electron pockets. Our results are consistent with not only three-dimensional, but also with quasi-two-dimensional portions of the Fermi surface. The SOC-induced gap in Dirac states is much larger when compared to isostructural SrMnBi2. This suggests that not only long-range magnetic order, but also mass of the alkaline-earth atoms A in ABX2 ( A = alkaline-earth, B = transition-metal, and X = Bi/Sb) are important for the presence of low-energy states obeying the relativistic Dirac equation at the Fermi surface.

Authors:
 [1];  [2];  [3];  [2];  [4];  [2];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Chinese Academy of Sciences (CAS), Shenyang (China)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
  4. Chinese Academy of Sciences (CAS), Shenyang (China)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1425072
Alternate Identifier(s):
OSTI ID: 1417697
Report Number(s):
BNL-203215-2018-JAAM
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1802030
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 3; 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

Citation Formats

Ren, Weijun, Wang, Aifeng, Graf, D., Liu, Yu, Zhang, Zhidong, Yin, Wei-Guo, and Petrovic, C. Absence of Dirac states in BaZnBi2 induced by spin-orbit coupling. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.035147.
Ren, Weijun, Wang, Aifeng, Graf, D., Liu, Yu, Zhang, Zhidong, Yin, Wei-Guo, & Petrovic, C. Absence of Dirac states in BaZnBi2 induced by spin-orbit coupling. United States. doi:10.1103/PhysRevB.97.035147.
Ren, Weijun, Wang, Aifeng, Graf, D., Liu, Yu, Zhang, Zhidong, Yin, Wei-Guo, and Petrovic, C. Mon . "Absence of Dirac states in BaZnBi2 induced by spin-orbit coupling". United States. doi:10.1103/PhysRevB.97.035147. https://www.osti.gov/servlets/purl/1425072.
@article{osti_1425072,
title = {Absence of Dirac states in BaZnBi2 induced by spin-orbit coupling},
author = {Ren, Weijun and Wang, Aifeng and Graf, D. and Liu, Yu and Zhang, Zhidong and Yin, Wei-Guo and Petrovic, C.},
abstractNote = {We report magnetotransport properties of BaZnBi2 single crystals. Whereas electronic structure features Dirac states, such states are removed from the Fermi level by spin-orbit coupling (SOC) and consequently electronic transport is dominated by the small hole and electron pockets. Our results are consistent with not only three-dimensional, but also with quasi-two-dimensional portions of the Fermi surface. The SOC-induced gap in Dirac states is much larger when compared to isostructural SrMnBi2. This suggests that not only long-range magnetic order, but also mass of the alkaline-earth atoms A in ABX2 ( A = alkaline-earth, B = transition-metal, and X = Bi/Sb) are important for the presence of low-energy states obeying the relativistic Dirac equation at the Fermi surface.},
doi = {10.1103/PhysRevB.97.035147},
journal = {Physical Review B},
number = 3,
volume = 97,
place = {United States},
year = {2018},
month = {1}
}

Journal Article:
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Cited by: 1 work
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Figures / Tables:

FIG. 1 FIG. 1: (a) Powder XRD pattern and refinement results of BaZnBi2. The data are shown by (+), fitting and difference curves are given by the red and green solid line, respectively. Ticks mark reflections of $I4/mmm$ space group (upper) and residual Bi (lower). Inset in (a) shows crystal structure ofmore » BaZnBi2. Ba atoms are denoted by green balls. Zn atoms are denoted by gray balls. Bi1 atoms denote Bi positions forming ZnBi4 tetrahedron. Bi2 atoms denote Bi positions forming 2D square lattices. Blue lines define the unit cell. (b) Heat capacity of BaZnBi2. (c) The magnetic field (B) dependence of the in-plane magnetoresistance MR at different temperatures for H//c.« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.