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Volume 35 Issue 2
Mar 2021
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Chinese Journal of High Pressure Physics  > 2021  >  35(2): 021102.
SHI Zhentian, YANG Xujia, WANG Haoyang, QIAO Li. Superconducting Transition of Nb3Sn Single Crystal under High-Pressure[J]. Chinese Journal of High Pressure Physics, 2021, 35(2): 021102. doi: 10.11858/gywlxb.20200615
Citation: SHI Zhentian, YANG Xujia, WANG Haoyang, QIAO Li. Superconducting Transition of Nb3Sn Single Crystal under High-Pressure[J]. Chinese Journal of High Pressure Physics, 2021, 35(2): 021102. doi: 10.11858/gywlxb.20200615
shu

Superconducting Transition of Nb3Sn Single Crystal under High-Pressure

doi: 10.11858/gywlxb.20200615

  • Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

  • Received Date: 21 Sep 2020
  • Rev Recd Date: 22 Oct 2020
    Abstract
  • Study on the superconducting transition of single crystal Nb3Sn under high pressure is valuable to understand the mechanism of critical performance degradation in superconducting Nb3Sn, which is induced by the mechanical deformation. In this paper, on the basis of molecular dynamics simulations, we studied high-pressure induced atomic scale deformation and crystal lattice distortions of single crystal Nb3Sn. Following this analysis, we established a superconducting transition model of single crystal Nb3Sn under high pressure. There is a good agreement between model predictions and experimental observations. The results show that the high pressure induces obvious lattice distortions in single crystal Nb3Sn, the lattice structure, however, remains intact. Pressure-induced change in density of states at the Fermi surface is shown to play a dominate role in superconducting transition in single crystal Nb3Sn. The results lay a foundation of understanding the high pressure induced superconducting transition of polycrystalline Nb3Sn. At the same time, they provide some detailed information on understanding the mechanism controlling for strain-induced critical performance degradation in Nb3Sn.

     

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