中国物理B ›› 2019, Vol. 28 ›› Issue (4): 46202-046202.doi: 10.1088/1674-1056/28/4/046202

所属专题: SPECIAL TOPIC — Topological semimetals

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Transport properties of topological nodal-line semimetal candidate CaAs3 under hydrostatic pressure

Jing Li(李婧), Ling-Xiao Zhao(赵凌霄), Yi-Yan Wang(王义炎), Xin-Min Wang(王欣敏), Chao-Yang Ma(麻朝阳), Wen-Liang Zhu(朱文亮), Mo-Ran Gao(高默然), Shuai Zhang(张帅), Zhi-An Ren(任治安), Gen-Fu Chen(陈根富)   

  1. 1 Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 SongShan Lake Materials Laboratory, Dongguan 523808, China
  • 收稿日期:2019-01-25 修回日期:2019-02-25 出版日期:2019-04-05 发布日期:2019-04-05
  • 通讯作者: Gen-Fu Chen E-mail:gfchen@iphy.ac.cn
  • 基金资助:

    Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0401000 and 2016YFA0300604), the National Key Basic Research Program of China (Grant No. 2015CB921303), the Strategic Priority Research Program (B) of Chinese Academy of Sciences (Grant No. XDB07020100), and the National Natural Science Foundation of China (Grant No. 11874417).

Transport properties of topological nodal-line semimetal candidate CaAs3 under hydrostatic pressure

Jing Li(李婧)1,2, Ling-Xiao Zhao(赵凌霄)1, Yi-Yan Wang(王义炎)1, Xin-Min Wang(王欣敏)1,2, Chao-Yang Ma(麻朝阳)1, Wen-Liang Zhu(朱文亮)1,2, Mo-Ran Gao(高默然)1,2, Shuai Zhang(张帅)1, Zhi-An Ren(任治安)1,2,3, Gen-Fu Chen(陈根富)1,2,3   

  1. 1 Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 SongShan Lake Materials Laboratory, Dongguan 523808, China
  • Received:2019-01-25 Revised:2019-02-25 Online:2019-04-05 Published:2019-04-05
  • Contact: Gen-Fu Chen E-mail:gfchen@iphy.ac.cn
  • Supported by:

    Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0401000 and 2016YFA0300604), the National Key Basic Research Program of China (Grant No. 2015CB921303), the Strategic Priority Research Program (B) of Chinese Academy of Sciences (Grant No. XDB07020100), and the National Natural Science Foundation of China (Grant No. 11874417).

摘要:

We report the transport properties of the CaAs3 single crystal, which has been predicted to be a candidate for topological nodal-line semimetals. At ambient pressure, CaAs3 exhibits semiconducting behavior with a small gap, while in some crystals containing tiny defects or impurities, a large “hump” in the resistivity is observed around 230 K. By applying hydrostatic pressure, the samples appear to a tendency towards metallic behavior, but not fully metallized up to 2 GPa. Further high pressure studies are needed to explore the topological characteristics for CaAs3.

关键词: hydrostatic pressure, topological material, crystal growth

Abstract:

We report the transport properties of the CaAs3 single crystal, which has been predicted to be a candidate for topological nodal-line semimetals. At ambient pressure, CaAs3 exhibits semiconducting behavior with a small gap, while in some crystals containing tiny defects or impurities, a large “hump” in the resistivity is observed around 230 K. By applying hydrostatic pressure, the samples appear to a tendency towards metallic behavior, but not fully metallized up to 2 GPa. Further high pressure studies are needed to explore the topological characteristics for CaAs3.

Key words: hydrostatic pressure, topological material, crystal growth

中图分类号:  (High-pressure effects in solids and liquids)

  • 62.50.-p
72.20.-i (Conductivity phenomena in semiconductors and insulators) 05.30.Rt (Quantum phase transitions)