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Chin. Phys. B, 2019, Vol. 28(10): 107501    DOI: 10.1088/1674-1056/ab3a89
Special Issue: SPECIAL TOPIC — A celebration of the 100th birthday of Kun Huang
SPECIAL TOPIC—A celebration of the 100th birthday of Kun Huang Prev   Next  

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 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
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.
Keywords:  topological Kondo insulator      magnetocaloric effect      magnetoresistance hysteresis  
Received:  11 June 2019      Revised:  24 July 2019      Accepted manuscript online: 
PACS:  75.47.-m (Magnetotransport phenomena; materials for magnetotransport)  
  73.20.At (Surface states, band structure, electron density of states)  
Fund: 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).
Corresponding Authors:  Zhi-Min Liao     E-mail:  liaozm@pku.edu.cn

Cite this article: 

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) Magnetoresistance hysteresis in topological Kondo insulator SmB6 nanowire 2019 Chin. Phys. B 28 107501

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