Superconductivity in NaxCoO2 yH2O due to Charge Fluctuation
Superconductivity in NaxCoO2 yH2O due to Charge Fluctuation
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DOI：
10.1143/jpsj.73.319
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发表时间：
2003-11
影响因子：
1.7
通讯作者：
Y. Tanaka;Y. Yanase;M. Ogata
中科院分区：
文献类型：
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作者：
Y. Tanaka;Y. Yanase;M. Ogata
提出了由于新发现的钴基氧化物中的电荷波动而产生超导的新机制。在随机相位近似内研究了三角晶格上的单带扩展哈伯德模型。 f 波三重态超导稳定在电荷密度波不稳定性附近，这与方晶格情况形成鲜明对比。讨论了 f 波三重态实现的物理起源及其与实验的相关性。
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.