中国物理B ›› 2019, Vol. 28 ›› Issue (10): 107501-107501.doi: 10.1088/1674-1056/ab3a89

所属专题: SPECIAL TOPIC — A celebration of the 100th birthday of Kun Huang

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

Magnetoresistance hysteresis in topological Kondo insulator SmB6 nanowire

Ling-Jian Kong(孔令剑), Yong Zhou(周勇), Hua-Ding Song(宋化鼎), Da-Peng Yu(俞大鹏), Zhi-Min Liao(廖志敏)   

  1. 1 State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China;
    2 Shenzhen Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China;
    3 Beijing Key Laboratory of Quantum Devices, Peking University, Beijing 100871, China;
    4 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
  • 收稿日期:2019-06-11 修回日期:2019-07-24 出版日期:2019-10-05 发布日期:2019-10-05
  • 通讯作者: Zhi-Min Liao E-mail:liaozm@pku.edu.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0300802) and the National Natural Science Foundation of China (Grant Nos. 61825401 and 11774004).

Magnetoresistance hysteresis in topological Kondo insulator SmB6 nanowire

Ling-Jian Kong(孔令剑)1, Yong Zhou(周勇)2, Hua-Ding Song(宋化鼎)1, Da-Peng Yu(俞大鹏)2, Zhi-Min Liao(廖志敏)1,3,4   

  1. 1 State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China;
    2 Shenzhen Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China;
    3 Beijing Key Laboratory of Quantum Devices, Peking University, Beijing 100871, China;
    4 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
  • Received:2019-06-11 Revised:2019-07-24 Online:2019-10-05 Published:2019-10-05
  • Contact: Zhi-Min Liao E-mail:liaozm@pku.edu.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0300802) and the National Natural Science Foundation of China (Grant Nos. 61825401 and 11774004).

摘要: SmB6, a topological Kondo insulator, with a gapped bulk state and metallic surface state has aroused great research interest. Here, we report an exotic hysteresis behavior of magnetoresistance in individual SmB6 nanowire in a temperature range in which both surface and bulk states contribute to the total conductance. Under a magnetic field parallel to the SmB6 nanowire, the resistance suddenly increases at the turning point from up-sweep to down-sweep of the magnetic field. The magnetoresistance hysteresis loops are well consistent with the magnetocaloric effect. Our results suggest that the SmB6 nanowires possess potential applications in the magnetic cooling technology.

关键词: topological Kondo insulator, magnetocaloric effect, magnetoresistance hysteresis

Abstract: SmB6, a topological Kondo insulator, with a gapped bulk state and metallic surface state has aroused great research interest. Here, we report an exotic hysteresis behavior of magnetoresistance in individual SmB6 nanowire in a temperature range in which both surface and bulk states contribute to the total conductance. Under a magnetic field parallel to the SmB6 nanowire, the resistance suddenly increases at the turning point from up-sweep to down-sweep of the magnetic field. The magnetoresistance hysteresis loops are well consistent with the magnetocaloric effect. Our results suggest that the SmB6 nanowires possess potential applications in the magnetic cooling technology.

Key words: topological Kondo insulator, magnetocaloric effect, magnetoresistance hysteresis

中图分类号:  (Magnetotransport phenomena; materials for magnetotransport)

  • 75.47.-m
73.20.At (Surface states, band structure, electron density of states)