中国物理B ›› 2021, Vol. 30 ›› Issue (6): 67403-067403.doi: 10.1088/1674-1056/ac0036

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Unusual electronic structure of Dirac material BaMnSb2 revealed by angle-resolved photoemission spectroscopy

Hongtao Rong(戎洪涛)1,2,†, Liqin Zhou(周丽琴)1,2,†, Junbao He(何俊宝)1,2,3,†, Chunyao Song(宋春尧)1,2,†, Yu Xu(徐煜)1,2, Yongqing Cai(蔡永青)1,2, Cong Li(李聪)1,2, Qingyan Wang(王庆艳)1,2, Lin Zhao(赵林)1,2,4, Guodong Liu(刘国东)1,2,4, Zuyan Xu(许祖彦)5, Genfu Chen(陈根富)1,2, Hongming Weng(翁红明)1,2, and Xingjiang Zhou(周兴江)1,2,4,6,‡   

  1. 1 National Laboratory for Superconductivity, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Henan International Joint Laboratory of MXene Materials Microstructure, College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China;
    4 Songshan Lake Materials Laboratory, Dongguan 523808, China;
    5 Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
    6 Beijing Academy of Quantum Information Sciences, Beijing 100193, China
  • 收稿日期:2021-05-07 修回日期:2021-05-07 接受日期:2021-05-12 出版日期:2021-05-18 发布日期:2021-06-05
  • 通讯作者: Xingjiang Zhou E-mail:xjzhou@iphy.ac.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0300600, 2018YFA0305602, 2016YFA0300300, and 2017YFA0302900), the National Natural Science Foundation of China (Grant Nos. 11974404, 11888101, 11922414, and 11404175), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant Nos. XDB33000000 and XDB25000000), the Youth Innovation Promotion Association of CAS (Grant No. 2017013), and the Natural Science Foundation of Henan Province, China (Grant Nos. 182300410274 and 202300410296). The theoretical calculations are supported by the National Natural Science Foundation of China (Grant Nos. 11674369, 11865019, and 11925408), the Beijing Natural Science Foundation, China (Grant No. Z180008), Beijing Municipal Science and Technology Commission, China (Grant No. Z191100007219013), the National Key Research and Development Program of China (Grant Nos. 2016YFA0300600 and 2018YFA0305700), the K. C. Wong Education Foundation (Grant No. GJTD-2018-01), and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB33000000).

Unusual electronic structure of Dirac material BaMnSb2 revealed by angle-resolved photoemission spectroscopy

Hongtao Rong(戎洪涛)1,2,†, Liqin Zhou(周丽琴)1,2,†, Junbao He(何俊宝)1,2,3,†, Chunyao Song(宋春尧)1,2,†, Yu Xu(徐煜)1,2, Yongqing Cai(蔡永青)1,2, Cong Li(李聪)1,2, Qingyan Wang(王庆艳)1,2, Lin Zhao(赵林)1,2,4, Guodong Liu(刘国东)1,2,4, Zuyan Xu(许祖彦)5, Genfu Chen(陈根富)1,2, Hongming Weng(翁红明)1,2, and Xingjiang Zhou(周兴江)1,2,4,6,‡   

  1. 1 National Laboratory for Superconductivity, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Henan International Joint Laboratory of MXene Materials Microstructure, College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China;
    4 Songshan Lake Materials Laboratory, Dongguan 523808, China;
    5 Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
    6 Beijing Academy of Quantum Information Sciences, Beijing 100193, China
  • Received:2021-05-07 Revised:2021-05-07 Accepted:2021-05-12 Online:2021-05-18 Published:2021-06-05
  • Contact: Xingjiang Zhou E-mail:xjzhou@iphy.ac.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0300600, 2018YFA0305602, 2016YFA0300300, and 2017YFA0302900), the National Natural Science Foundation of China (Grant Nos. 11974404, 11888101, 11922414, and 11404175), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant Nos. XDB33000000 and XDB25000000), the Youth Innovation Promotion Association of CAS (Grant No. 2017013), and the Natural Science Foundation of Henan Province, China (Grant Nos. 182300410274 and 202300410296). The theoretical calculations are supported by the National Natural Science Foundation of China (Grant Nos. 11674369, 11865019, and 11925408), the Beijing Natural Science Foundation, China (Grant No. Z180008), Beijing Municipal Science and Technology Commission, China (Grant No. Z191100007219013), the National Key Research and Development Program of China (Grant Nos. 2016YFA0300600 and 2018YFA0305700), the K. C. Wong Education Foundation (Grant No. GJTD-2018-01), and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB33000000).

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摘要： High resolution angle resolved photoemission measurements and band structure calculations are carried out to study the electronic structure of BaMnSb2. All the observed bands are nearly linear that extend to a wide energy range. The measured Fermi surface mainly consists of one hole pocket around Γ and a strong spot at Y which are formed from the crossing points of the linear bands. The measured electronic structure of BaMnSb2 is unusual and deviates strongly from the band structure calculations. These results will stimulate further efforts to theoretically understand the electronic structure of BaMnSb2 and search for novel properties in this Dirac material.

关键词: ARPES, BaMnSb2, Dirac material, magnetic topological material

Abstract: High resolution angle resolved photoemission measurements and band structure calculations are carried out to study the electronic structure of BaMnSb2. All the observed bands are nearly linear that extend to a wide energy range. The measured Fermi surface mainly consists of one hole pocket around Γ and a strong spot at Y which are formed from the crossing points of the linear bands. The measured electronic structure of BaMnSb2 is unusual and deviates strongly from the band structure calculations. These results will stimulate further efforts to theoretically understand the electronic structure of BaMnSb2 and search for novel properties in this Dirac material.

Key words: ARPES, BaMnSb2, Dirac material, magnetic topological material

中图分类号:  (Electronic structure (photoemission, etc.))

  • 74.25.Jb