Superconductivity in NaxCoO2·yH2O due to Charge Fluctuation
- 15 February 2004
- journal article
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 73 (2) , 319-322
- https://doi.org/10.1143/jpsj.73.319
Abstract
A new mechanism for superconductivity in the newly discovered Co-based oxide is proposed by using charge fluctuation. A single-band extended Hubbard model on the triangular lattice is studied within random phase approximation. $f$-wave triplet superconductivity is stabilized in the vicinity of charge-density-wave instability, which is in sharp contrast with the square-lattice case. The physical origin of the realization of the $f$-wave triplet state as well as the relevance to experiments are discussedKeywords
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