Phonon anomaly and anisotropic superconducting gap in non-centrosymmetric Li2(Pd1-xPtx)3B

G. Eguchi; D. C. Peets; M. Kriener; S. Yonezawa; G. Bao; S. Harada; Y. Inada; G. -q. Zheng; Y. Maeno

doi:10.1103/PhysRevB.87.161203

Phonon anomaly and anisotropic superconducting gap in non-centrosymmetric Li2(Pd1-xPtx)3B

Superconductivity 2013-05-10 v1

Authors: G. Eguchi , D. C. Peets , M. Kriener , S. Yonezawa , G. Bao , S. Harada , Y. Inada , G. -q. Zheng , Y. Maeno

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

We report the systematic investigation of the specific heat of the noncentrosymmetric supercon- ductor Li2(Pd1-xPtx)3B as a function of x. There is a large deviation of the phononic specific heat from the conventional Debye specific heat for Pt-rich samples. In contrast with the fully-gapped con- ventional behavior for small x, a power-law temperature dependence of the electronic specific heat is observed even at x = 0.5. This results manifest a strongly-anisotropic or nodal superconducting gap even at x = 0.5 and a nodal superconducting gap for x >~ 0.9.

Keywords

non-centrosymmetric superconductor phonon anomaly anisotropic superconducting gap specific heat Li2(Pd1-xPtx)3B nodal gap Debye specific heat

Cite

@article{arxiv.1305.2045,
  title  = {Phonon anomaly and anisotropic superconducting gap in non-centrosymmetric Li2(Pd1-xPtx)3B},
  author = {G. Eguchi and D. C. Peets and M. Kriener and S. Yonezawa and G. Bao and S. Harada and Y. Inada and G. -q. Zheng and Y. Maeno},
  journal= {arXiv preprint arXiv:1305.2045},
  year   = {2013}
}

Comments

4 pages, 4 figures

Phonon anomaly and anisotropic superconducting gap in non-centrosymmetric Li2(Pd1-xPtx)3B

Abstract

Keywords

Cite

Comments

Related papers