Specific heat and superfluid density for possible two different superconducting states in NaxCoO2·yH2O

Masahito Mochizuki*, H. Q. Yuan, Masao Ogata

*この研究の対応する著者

研究成果: Article査読

12 被引用数 (Scopus)

抄録

Several thermodynamic measurements for the cobaltate superconductor, NaxCoO2·yH2O, have so far provided results inconsistent with each other. In order to solve the discrepancies, we microscopically calculate the temperature dependences of specific heat and superfluid density for this superconductor. We show that two distinct specific-heat data from Oeschler et al. and Jin et al. are reproduced, respectively, for the extended s-wave state and the p-wave state. Two different superfluid-density data are also reproduced for each case. These support our recent proposal of possible two different pairing states in this material. In addition, we discuss the experimentally proposed large residual Sommerfeld coefficient and extremely huge effective carrier mass.

本文言語English
論文番号023702
ジャーナルjournal of the physical society of japan
76
2
DOI
出版ステータスPublished - 2007 2月
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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