Quantum oscillations and Dirac dispersion in the BaZnBi2 semimetal guaranteed by local Zn vacancy order

K. Zhao; E. Golias; Q. H. Zhang; M. Krivenkov; A. Jesche; L. Gu; O. Rader; I. I. Mazin; P. Gegenwart

doi:10.1103/PhysRevB.97.115166

Quantum oscillations and Dirac dispersion in the BaZnBi2 semimetal guaranteed by local Zn vacancy order

K. Zhao^*
, E. Golias
, Q. H. Zhang
, M. Krivenkov
, A. Jesche
, L. Gu
, O. Rader
, I. I. Mazin
, P. Gegenwart

^*Corresponding author for this work

Augsburg University
Helmholtz Centre Berlin for Materials and Energy
Free University of Berlin
CAS - Institute of Physics
Naval Research Laboratory

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

We have synthesized single crystals of Dirac semimetal candidates AZnBi2 with A=Ba and Sr. In contrast to A=Sr, the Ba material displays a local Zn vacancy ordering, which makes the observation of quantum oscillations in out-of-plane magnetic fields possible. As a Dirac semimetal candidate, BaZnBi2 exhibits a small cyclotron electron mass, high quantum mobility, and nontrivial Berry phases. Three Dirac dispersions are observed by angle-resolved photoemission spectroscopy and identified by first-principles band-structure calculations. Compared to AMn(Bi/Sb)2 systems which host Mn magnetic moments, BaZnBi2 acts as a nonmagnetic analog to investigate the intrinsic properties of Dirac fermions in this structure family.

Original language	English
Article number	115166
Journal	Physical Review B
Volume	97
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevB.97.115166
State	Published - 30 Mar 2018
Externally published	Yes

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title = "Quantum oscillations and Dirac dispersion in the BaZnBi2 semimetal guaranteed by local Zn vacancy order",

abstract = "We have synthesized single crystals of Dirac semimetal candidates AZnBi2 with A=Ba and Sr. In contrast to A=Sr, the Ba material displays a local Zn vacancy ordering, which makes the observation of quantum oscillations in out-of-plane magnetic fields possible. As a Dirac semimetal candidate, BaZnBi2 exhibits a small cyclotron electron mass, high quantum mobility, and nontrivial Berry phases. Three Dirac dispersions are observed by angle-resolved photoemission spectroscopy and identified by first-principles band-structure calculations. Compared to AMn(Bi/Sb)2 systems which host Mn magnetic moments, BaZnBi2 acts as a nonmagnetic analog to investigate the intrinsic properties of Dirac fermions in this structure family.",

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doi = "10.1103/PhysRevB.97.115166",

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T1 - Quantum oscillations and Dirac dispersion in the BaZnBi2 semimetal guaranteed by local Zn vacancy order

AU - Zhao, K.

AU - Golias, E.

AU - Zhang, Q. H.

AU - Krivenkov, M.

AU - Jesche, A.

AU - Gu, L.

AU - Rader, O.

AU - Mazin, I. I.

AU - Gegenwart, P.

PY - 2018/3/30

Y1 - 2018/3/30

N2 - We have synthesized single crystals of Dirac semimetal candidates AZnBi2 with A=Ba and Sr. In contrast to A=Sr, the Ba material displays a local Zn vacancy ordering, which makes the observation of quantum oscillations in out-of-plane magnetic fields possible. As a Dirac semimetal candidate, BaZnBi2 exhibits a small cyclotron electron mass, high quantum mobility, and nontrivial Berry phases. Three Dirac dispersions are observed by angle-resolved photoemission spectroscopy and identified by first-principles band-structure calculations. Compared to AMn(Bi/Sb)2 systems which host Mn magnetic moments, BaZnBi2 acts as a nonmagnetic analog to investigate the intrinsic properties of Dirac fermions in this structure family.

AB - We have synthesized single crystals of Dirac semimetal candidates AZnBi2 with A=Ba and Sr. In contrast to A=Sr, the Ba material displays a local Zn vacancy ordering, which makes the observation of quantum oscillations in out-of-plane magnetic fields possible. As a Dirac semimetal candidate, BaZnBi2 exhibits a small cyclotron electron mass, high quantum mobility, and nontrivial Berry phases. Three Dirac dispersions are observed by angle-resolved photoemission spectroscopy and identified by first-principles band-structure calculations. Compared to AMn(Bi/Sb)2 systems which host Mn magnetic moments, BaZnBi2 acts as a nonmagnetic analog to investigate the intrinsic properties of Dirac fermions in this structure family.

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DO - 10.1103/PhysRevB.97.115166

M3 - 文章

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SN - 2469-9950

VL - 97

JO - Physical Review B

JF - Physical Review B

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ER -

Quantum oscillations and Dirac dispersion in the BaZnBi2 semimetal guaranteed by local Zn vacancy order

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