Pairing correlation functions in the triangular t-J model : d-wave and f-wave superconductivity
Pairing correlation functions in the triangular t-J model : d-wave and f-wave superconductivity
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DOI：
10.1103/physrevb.72.134513
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发表时间：
2005-10
影响因子：
3.7
通讯作者：
T. Koretsune;M. Ogata
中科院分区：
文献类型：
--
作者：
T. Koretsune;M. Ogata
Equal-time pairing correlation functions of the two-dimensionalmodel on the triangular lattice are studied using high-temperature expansions method. We calculate the pairing correlation lengths and the effective pairing interactions down to, and find the growth of pairing correlations. Whenwith hole doping, a rapid growth of effective-wave pairing interaction is found that indicates the resonating-valence-bond superconductivity. In contrast, when, where the ferromagnetic correlation and antiferromagnetic correlation compete, correlation lengths of triplet pairings as well as-wave pairing grow at low temperatures, although they do not diverge forin the competing region, i.e., near half-filling. On the other hand, around,-wave pairing correlation tends to diverge, although its effective interaction is small. Relation of the present study to the recently discovered superconductor,, is discussed.
