Deformation of electronic structures due to CoO6 distortion and phase diagrams of NaxCoO2·yH2O

Masahito Mochizuki*, Masao Ogata

*この研究の対応する著者

研究成果: Article査読

25 被引用数 (Scopus)

抄録

Motivated by recently reported experimental phase diagrams, we study the effects of CoO6 distortion on the electronic structure in Na xCoO2·yH2O. We construct the multiband tight-binding model by employing the LDA result. Analyzing this model, we show the deformation of band dispersions and Fermi-surface topology as functions of CoO2-layer thickness. Considering these results together with previous theoretical ones, we propose a possible schematic phase diagram with three successive phases: the extended s-wave superconductivity (SC), the magnetic order, and the spin-triplet SC phases when the Co valence number s is +3.4. A phase diagram with only one phase of spin-triplet SC is also proposed for the s = +3:5 case.

本文言語English
論文番号113703
ジャーナルjournal of the physical society of japan
75
11
DOI
出版ステータスPublished - 2006 11
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

フィンガープリント

「Deformation of electronic structures due to CoO<sub>6</sub> distortion and phase diagrams of Na<sub>x</sub>CoO<sub>2</sub>·yH<sub>2</sub>O」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル