Absence of Dirac states in BaZnBi2 induced by spin-orbit coupling

Ren, Weijun; Wang, Aifeng; Graf, D.; Liu, Yu; Zhang, Zhidong; Yin, Wei-Guo; Petrovic, C.

doi:10.1103/PhysRevB.97.035147

Title: Absence of Dirac states in ${BaZnBi}_{2}$ induced by spin-orbit coupling

Journal Article · Mon Jan 22 00:00:00 EST 2018 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.97.035147· OSTI ID:1425072

Ren, Weijun ^[1]; Wang, Aifeng ^[2]; Graf, D. ^[3]; Liu, Yu ^[2]; Zhang, Zhidong ^[4]; Yin, Wei-Guo ^[2]; Petrovic, C. ^[2]

Brookhaven National Lab. (BNL), Upton, NY (United States); Chinese Academy of Sciences (CAS), Shenyang (China)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
Chinese Academy of Sciences (CAS), Shenyang (China)

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.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012704

OSTI ID:: 1425072

Alternate ID(s):: OSTI ID: 1417697

Report Number(s):: BNL-203215-2018-JAAM; PRBMDO; TRN: US1802030

Journal Information:: Physical Review B, Vol. 97, Issue 3; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 11 works

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