Possible Pairing Symmetry of Superconductor Na<sub><i>x</i></sub>CoO<sub>2</sub>·<i>y</i>H<sub>2</sub>O

DOI DOI Web Site Web Site BIBCODE 被引用文献5件 参考文献32件 オープンアクセス

書誌事項

タイトル別名
  • Possible Pairing Symmetry of Superconductor NaxCoO2 yH2O

この論文をさがす

説明

To discuss the possibility that the superconductivities in NaxCoO2·yH2O are induced by electron correlation, we investigate the possible pairing symmetry based on the single-band Hubbard model whose dispersion of the bare energy band is obtained using the band structure calculation of NaxCoO2·yH2O. The superconducting transition temperature is estimated by solving the Éliashberg equation. In this equation, both normal and anomalous self-energies are calculated up to the third-order terms with respect to the Coulomb repulsion. In the case of spin-singlet pairing, the candidate of pairing symmetry (the maximum eigen value λmaxSS of Éliashberg’s equation) belongs to the d-wave (E2 representation of D6 group). In the case of spin-triplet pairing, the candidate of pairing symmetry (the maximum eigen value λmaxST of Éliashberg’s equation) belongs to the fy(y2−3x2)-wave (B1 representation of D6 group). It is found that λmaxSS\\simeqλmaxST and the transition temperatures of unconventional pairing state are estimated to be low compared with the observed temperature within our simple model.

収録刊行物

被引用文献 (5)*注記

もっと見る

参考文献 (32)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ