Specific heat of Li2 (Pd1 - x Ptx)3 B superconductors [x = 0, 0.5, and 1]

Hiroyuki Takeya, Shigeru Kasahara, Mohammed El Massalami, Takashi Mochiku, Kazuto Hirata, Kazumasa Togano

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The specific heat of Li2 (Pd1 - x Ptx)3 B [x = 0, 0.5, 1] was measured. The heat jumps due to the superconducting transition were observed at 7.0, 3.9, and 2.5 K (Tc), respectively. These compounds have the same cubic structure (P 43 32) without mirror or inversion symmetry. Being noncentrosymmetric, it is interesting then to study the symmetry of superconducting gap function and Cooper pairs. The behavior of the electronic-specific heat Ces of Li2 (Pd1 - x Ptx)3 B at low temperatures < Tc / 3 showed different features with varying x. The temperature dependence of Ces for one end member, Li2 Pd3 B, follows an exponential behavior as in conventional superconductors, while that of Li2 Pd1.5 Pt1.5 B and Li2 Pt3 B tends to follow a quadratic term rather than an exponential one.

Original languageEnglish
Pages (from-to)1078-1080
Number of pages3
JournalPhysica B: Condensed Matter
Volume403
Issue number5-9
DOIs
Publication statusPublished - Apr 1 2008
Externally publishedYes

Keywords

  • Li Pd B
  • Li Pt B
  • Specific heat
  • Superconductor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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