Josephson Effect between Noncentrosymmetric LaPt<sub>3</sub>Si and a Conventional Superconductor

DOI Web Site 4 Citations 21 References
  • Yoshihiro Aoki
    Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan
  • Akihiko Sumiyama
    Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan
  • Masahiro Shiotsuki
    Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan
  • Gaku Motoyama
    Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan
  • Akira Yamaguchi
    Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan
  • Yasukage Oda
    Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan
  • Takashi Yasuda
    Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
  • Rikio Settai
    Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
  • Yoshichika Ōnuki
    Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan

Description

The Josephson effect between LaPt 3 Si and Al has been investigated for junctions on the (100) and (001) faces of LaPt 3 Si single crystals and a polycrystal. In the magnetic-field dependence of the Josephson critical current, the anomaly previously reported for CePt 3 Si appeared; an oscillating pattern without a dominant maximum peak at zero field was observed for the junction on the (001) face. This cannot be interpreted as the Josephson effect between conventional s -wave superconductors and suggests that the origin of the anomaly lies in the noncentrosymmetric crystal structure.

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