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Title: Electron-phonon coupling in superconducting β-PdBi{sub 2}

We have studied the electronic, transport and vibrational properties of low temperature superconductor β-PdBi{sub 2}. The band manifold clearly demonstrates the 2D-layered structure with multiple gaps. The intersection of bands at E{sub F} in the Γ-P, Γ-N directions gives rise to complicated Fermi surface topology, which contains quite complicated multiple connected sheets, as well as hole and electron-like pockets. From the low temperature specific heat, we have estimated the electron-phonon coupling constant λ{sub el-ph} which has a very high value of 3.66. The vibrational properties clearly illustrates that the strong coupling makes the lattice unstable. The calculated properties confirm that β-PdBi{sub 2} is an intermediate coupling superconductor.
Authors:
 [1] ; ;  [2]
  1. Dept. of Physics, Feroze Gandhi Institute of Engineering and Technology, Raebareli-229001 (India)
  2. Theoretical Condensed Matter Physics Laboratory, Dept. of Physics, Feroze Gandhi College, Raebareli-229001 (India)
Publication Date:
OSTI Identifier:
22490554
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BISMUTH BASE ALLOYS; COUPLING CONSTANTS; CRYSTAL LATTICES; ELECTRONIC STRUCTURE; ELECTRON-PHONON COUPLING; ELECTRONS; FERMI LEVEL; HOLES; PALLADIUM ALLOYS; SHEETS; SPECIFIC HEAT; SUPERCONDUCTORS