Peak in the superconducting transition temperature of the nonmagnetic topological line-nodal material CaSb2 under pressure

• Kitagawa, Shunsaku

• Ishida, Kenji

• Ikeda, Atsutoshi

• Kawaguchi, Mayo

• Yonezawa, Shingo

• Maeno, Yoshiteru

Bibliographic Information

Other Title

• Peak in the superconducting transition temperature of the nonmagnetic topological line-nodal material <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>CaSb</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> under pressure

Abstract

Investigating the pressure dependence of the superconducting (SC) transition temperature T-c is crucial for understanding the SC mechanism. Herein, we report on the pressure dependence of T-c in the nonmagnetic topological line-nodal material CaSb₂ based on measurements of electric resistance and alternating current magnetic susceptibility. T-c initially increases with increasing pressure and peaks at similar to 3.1 GPa. With a further increase in pressure, T-c decreases and finally becomes undetectable at 5.9 GPa. Because no signs of phase transition or Lifshitz transition are observed in the normal state, the peculiar peak structure of T-c suggests that CaSb₂ has an unconventional SC character.

Journal

• Physical Review B

  Physical Review B 104 (6), 2021-08

  American Physical Society (APS)

Keywords

• Superconductivity
• Superconductors
• Topological materials
• AC susceptibility measurements
• Band structure methods
• Pressure effects
• Resistivity measurements
• Condensed Matter, Materials & Applied Physics

Details

• CRID: 1050854718008541440
• NII Article ID: 120007192996
• DOI: 10.1103/physrevb.104.l060504
• ISSN: 24699969
• ISSN: 24699950
• HANDLE: 2433/268049
• Web Site: https://link.aps.org/article/10.1103/PhysRevB.104.L060504
• Web Site: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.104.L060504/fulltext
• Text Lang: en
• Article Type: journal article
• Data Source:
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  • Crossref
  • CiNii Articles
  • KAKEN