Superconductivity in NaxCoO2·yH2O due to charge fluctuation

Yasuhiro Tanaka; Youichi Yanase; Masao Ogata

doi:10.1143/JPSJ.73.319

Superconductivity in Na_xCoO₂·yH₂O due to charge fluctuation

Yasuhiro Tanaka^*, Youichi Yanase, Masao Ogata

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

77 Citations (Scopus)

Abstract

A new mechanism of superconductivity due to charge fluctuation in the newly discovered Co-based oxide is proposed. A single-band extended Hubbard model on a triangular lattice is studied within the random phase approximation, f-wave triplet superconductivity is stabilized in the vicinity of charge-density-wave instability, which is in sharp contrast to the square-lattice case. The physical origin of the realization of the f-wave triplet state as well as its relevance to experiments are discussed.

Original language	English
Pages (from-to)	319-322
Number of pages	4
Journal	journal of the physical society of japan
Volume	73
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.73.319
Publication status	Published - 2004 Feb
Externally published	Yes

Keywords

Charge fluctuation
Co-based oxides
Triplet superconductivity

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.73.319

Cite this

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AB - A new mechanism of superconductivity due to charge fluctuation in the newly discovered Co-based oxide is proposed. A single-band extended Hubbard model on a triangular lattice is studied within the random phase approximation, f-wave triplet superconductivity is stabilized in the vicinity of charge-density-wave instability, which is in sharp contrast to the square-lattice case. The physical origin of the realization of the f-wave triplet state as well as its relevance to experiments are discussed.

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