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

G. Eguchi, D. C. Peets, M. Kriener, S. Yonezawa, G. Bao, S. Harada, Yoshihiko Inada, Guo-Qing Zheng, Y. Maeno

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Abstract

We report the systematic investigation of the specific heat of the noncentrosymmetric superconductor 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 conventional behavior for small x, a power-law temperature dependence of the electronic specific heat is observed even at x=0.5. These results manifest a strongly anisotropic or nodal superconducting gap even at x=0.5 and a nodal superconducting gap for xâ‰30.9.

Original languageEnglish
Article number161203
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number16
DOIs
Publication statusPublished - Apr 30 2013

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Specific heat
specific heat
anomalies
Superconducting materials
deviation
temperature dependence
electronics
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Phonon anomaly and anisotropic superconducting gap in noncentrosymmetric Li2(Pd1-xPtx)3B. / Eguchi, G.; Peets, D. C.; Kriener, M.; Yonezawa, S.; Bao, G.; Harada, S.; Inada, Yoshihiko; Zheng, Guo-Qing; Maeno, Y.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 87, No. 16, 161203, 30.04.2013.

Research output: Contribution to journalArticle

Eguchi, G. ; Peets, D. C. ; Kriener, M. ; Yonezawa, S. ; Bao, G. ; Harada, S. ; Inada, Yoshihiko ; Zheng, Guo-Qing ; Maeno, Y. / Phonon anomaly and anisotropic superconducting gap in noncentrosymmetric Li2(Pd1-xPtx)3B. In: Physical Review B - Condensed Matter and Materials Physics. 2013 ; Vol. 87, No. 16.
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AU - Yonezawa, S.

AU - Bao, G.

AU - Harada, S.

AU - Inada, Yoshihiko

AU - Zheng, Guo-Qing

AU - Maeno, Y.

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