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Colossal Nernst power factor in topological semimetal NbSb2

Author

Listed:
  • Peng Li

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Pengfei Qiu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Qing Xu

    (Chinese Academy of Sciences)

  • Jun Luo

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yifei Xiong

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Jie Xiao

    (Chinese Academy of Sciences)

  • Niraj Aryal

    (Brookhaven National Laboratory)

  • Qiang Li

    (Brookhaven National Laboratory
    Stony Brook University)

  • Lidong Chen

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Xun Shi

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

Abstract

Today solid-state cooling technologies below liquid nitrogen boiling temperature (77 K), crucial to quantum information technology and probing quantum state of matter, are greatly limited due to the lack of good thermoelectric and/or thermomagnetic materials. Here, we report the discovery of colossal Nernst power factor of 3800 × 10−4 W m−1 K−2 under 5 T at 25 K and high Nernst figure-of-merit of 71 × 10−4 K−1 under 5 T at 20 K in topological semimetal NbSb2 single crystals. The observed high thermomagnetic performance is attributed to large Nernst thermopower and longitudinal electrical conductivity, and relatively low transverse thermal conductivity. The large and unsaturated Nernst thermopower is the result of the combination of highly desirable electronic structures of NbSb2 having compensated high mobility electrons and holes near Fermi level and strong phonon-drag effect. This discovery opens an avenue for exploring material option for the solid-state heat pumping below liquid nitrogen temperature.

Suggested Citation

  • Peng Li & Pengfei Qiu & Qing Xu & Jun Luo & Yifei Xiong & Jie Xiao & Niraj Aryal & Qiang Li & Lidong Chen & Xun Shi, 2022. "Colossal Nernst power factor in topological semimetal NbSb2," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35289-z
    DOI: 10.1038/s41467-022-35289-z
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    References listed on IDEAS

    as
    1. Zhiwei Chen & Xinyue Zhang & Jie Ren & Zezhu Zeng & Yue Chen & Jian He & Lidong Chen & Yanzhong Pei, 2021. "Leveraging bipolar effect to enhance transverse thermoelectricity in semimetal Mg2Pb for cryogenic heat pumping," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    2. Jing Chu & Jian Huang & Ruiheng Liu & Jincheng Liao & Xugui Xia & Qihao Zhang & Chao Wang & Ming Gu & Shengqiang Bai & Xun Shi & Lidong Chen, 2020. "Electrode interface optimization advances conversion efficiency and stability of thermoelectric devices," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    3. Fei Han & Nina Andrejevic & Thanh Nguyen & Vladyslav Kozii & Quynh T. Nguyen & Tom Hogan & Zhiwei Ding & Ricardo Pablo-Pedro & Shreya Parjan & Brian Skinner & Ahmet Alatas & Ercan Alp & Songxue Chi & , 2020. "Quantized thermoelectric Hall effect induces giant power factor in a topological semimetal," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
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