Andreev bound state and multiple energy gaps in the noncentrosymmetric superconductor BiPd Academic Article uri icon

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abstract

  • We report directional point contact Andreev reflection (PCAR) measurements on high-quality single crystals of the non-centrosymmetric superconductor, BiPd. The PCAR spectra measured on different crystallographic faces of the single crystal clearly show the presence of multiple superconducting energy gaps. For point contacts with low resistance, in addition to the superconducting gap feature, a pronounced zero bias conductance peak is observed. These observations provide strong evidence of the presence of unconventional order parameter in this material.

authors

  • Mondal, Mintu
  • Joshi, Bhanu
  • Kumar, Sanjeev
  • Kamlapure, Anand
  • Ganguli, Subhas Chandra
  • Thamizhavel, Arumugam
  • Mandal, Sudhansu S
  • Ramakrishnan, Srinivasan
  • Raychaudhuri, Pratap

publication date

  • September 18, 2012