Abstract
Transport and thermodynamic properties were studied for the complex metallic compound , composed of 925 atoms per unit cell. exhibits bulk superconductivity below . An exponential temperature dependence of the specific heat well below indicates BCS-like behavior with a nodeless gap of width . The coherence length is derived as and the Ginzburg Landau parameter , characterizing as a type II superconductor. Superconductivity in occurs in the absence of inversion symmetry of the crystal. Surprisingly, in spite of the rather complex crystal structure of , physical properties turn out to be quite simple.
- Received 19 March 2007
DOI:https://doi.org/10.1103/PhysRevB.76.014528
©2007 American Physical Society