Highly mobile carriers in a candidate of quasi-two-dimensional topological semimetal AuTe2Br

Zeji Wang, Shuyu Cheng, Tay Rong Chang, Wenlong Ma, Xitong Xu, Huibin Zhou, Guangqiang Wang, Xin Gui, Haipeng Zhu, Zhen Zhu, Hao Zheng, Jinfeng Jia, Junfeng Wang, Weiwei Xie, Shuang Jia

Research output: Contribution to journalArticle

Abstract

We report the crystal and electronic structures of a noncentrosymmetric quasi-two-dimensional (2D) candidate of topological semimetal AuTe2Br. The Fermi surface of this layered compound consists of 2D-like, topological trivial electron and nontrivial hole pockets, which host a Dirac cone along the kz direction. Our transport measurements on the single crystals show highly anisotropic, compensated low-density electrons and holes, both of which exhibit ultrahigh mobility at a level of 105 cm2 V-1 s-1 at low temperature. The highly mobile, compensated carriers lead a nonsaturated, parabolic magnetoresistance as large as 3 × 105 in single-crystalline AuTe2Br in a magnetic field up to 58 T.

Original languageEnglish
Article number101110
JournalAPL Materials
Volume7
Issue number10
DOIs
Publication statusPublished - 2019 Oct 1

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Metalloids
Fermi surface
Magnetoresistance
Electronic structure
Carrier concentration
Cones
Crystal structure
Single crystals
Magnetic fields
Crystalline materials
Electrons
Temperature
Direction compound

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

Cite this

Wang, Zeji ; Cheng, Shuyu ; Chang, Tay Rong ; Ma, Wenlong ; Xu, Xitong ; Zhou, Huibin ; Wang, Guangqiang ; Gui, Xin ; Zhu, Haipeng ; Zhu, Zhen ; Zheng, Hao ; Jia, Jinfeng ; Wang, Junfeng ; Xie, Weiwei ; Jia, Shuang. / Highly mobile carriers in a candidate of quasi-two-dimensional topological semimetal AuTe2Br. In: APL Materials. 2019 ; Vol. 7, No. 10.
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abstract = "We report the crystal and electronic structures of a noncentrosymmetric quasi-two-dimensional (2D) candidate of topological semimetal AuTe2Br. The Fermi surface of this layered compound consists of 2D-like, topological trivial electron and nontrivial hole pockets, which host a Dirac cone along the kz direction. Our transport measurements on the single crystals show highly anisotropic, compensated low-density electrons and holes, both of which exhibit ultrahigh mobility at a level of 105 cm2 V-1 s-1 at low temperature. The highly mobile, compensated carriers lead a nonsaturated, parabolic magnetoresistance as large as 3 × 105 in single-crystalline AuTe2Br in a magnetic field up to 58 T.",
author = "Zeji Wang and Shuyu Cheng and Chang, {Tay Rong} and Wenlong Ma and Xitong Xu and Huibin Zhou and Guangqiang Wang and Xin Gui and Haipeng Zhu and Zhen Zhu and Hao Zheng and Jinfeng Jia and Junfeng Wang and Weiwei Xie and Shuang Jia",
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Wang, Z, Cheng, S, Chang, TR, Ma, W, Xu, X, Zhou, H, Wang, G, Gui, X, Zhu, H, Zhu, Z, Zheng, H, Jia, J, Wang, J, Xie, W & Jia, S 2019, 'Highly mobile carriers in a candidate of quasi-two-dimensional topological semimetal AuTe2Br', APL Materials, vol. 7, no. 10, 101110. https://doi.org/10.1063/1.5121751

Highly mobile carriers in a candidate of quasi-two-dimensional topological semimetal AuTe2Br. / Wang, Zeji; Cheng, Shuyu; Chang, Tay Rong; Ma, Wenlong; Xu, Xitong; Zhou, Huibin; Wang, Guangqiang; Gui, Xin; Zhu, Haipeng; Zhu, Zhen; Zheng, Hao; Jia, Jinfeng; Wang, Junfeng; Xie, Weiwei; Jia, Shuang.

In: APL Materials, Vol. 7, No. 10, 101110, 01.10.2019.

Research output: Contribution to journalArticle

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T1 - Highly mobile carriers in a candidate of quasi-two-dimensional topological semimetal AuTe2Br

AU - Wang, Zeji

AU - Cheng, Shuyu

AU - Chang, Tay Rong

AU - Ma, Wenlong

AU - Xu, Xitong

AU - Zhou, Huibin

AU - Wang, Guangqiang

AU - Gui, Xin

AU - Zhu, Haipeng

AU - Zhu, Zhen

AU - Zheng, Hao

AU - Jia, Jinfeng

AU - Wang, Junfeng

AU - Xie, Weiwei

AU - Jia, Shuang

PY - 2019/10/1

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N2 - We report the crystal and electronic structures of a noncentrosymmetric quasi-two-dimensional (2D) candidate of topological semimetal AuTe2Br. The Fermi surface of this layered compound consists of 2D-like, topological trivial electron and nontrivial hole pockets, which host a Dirac cone along the kz direction. Our transport measurements on the single crystals show highly anisotropic, compensated low-density electrons and holes, both of which exhibit ultrahigh mobility at a level of 105 cm2 V-1 s-1 at low temperature. The highly mobile, compensated carriers lead a nonsaturated, parabolic magnetoresistance as large as 3 × 105 in single-crystalline AuTe2Br in a magnetic field up to 58 T.

AB - We report the crystal and electronic structures of a noncentrosymmetric quasi-two-dimensional (2D) candidate of topological semimetal AuTe2Br. The Fermi surface of this layered compound consists of 2D-like, topological trivial electron and nontrivial hole pockets, which host a Dirac cone along the kz direction. Our transport measurements on the single crystals show highly anisotropic, compensated low-density electrons and holes, both of which exhibit ultrahigh mobility at a level of 105 cm2 V-1 s-1 at low temperature. The highly mobile, compensated carriers lead a nonsaturated, parabolic magnetoresistance as large as 3 × 105 in single-crystalline AuTe2Br in a magnetic field up to 58 T.

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