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arXiv 0810.3387cond-mat.str-el
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三格点循环交换铁磁相互作用引起的自旋-三重态f波配对

Spin-triplet f-wave pairing due to three-site cyclic-exchange ferromagnetic interactions

S. Nishimoto, Y. Ohta

摘要:

用密度矩阵重整化群方法研究了二维三角格子哈伯德模型中的铁磁和超导电性。我们提出了一种由三位循环交换铁磁相互作用产生的{ \it f}波自旋三重态配对机制。我们指出,在(可能的)自旋三重态超导体系中,如Bechgaard盐(TMTSF)$_2$ X、氧化钴Na $_{0.35}$ CoO $_2$ $\cdot$ 1.3H $_2$ O和层状钙钛矿Sr $_2$ RuO $_4$中,包含了三位循环跳跃过程所需的跳跃积分三角形网络.

英文摘要:

Ferromagnetiam and superconductivity in a two-dimensional triangular-lattice Hubbard model are studied using the density-matrix renormalization group method. We propose a mechanism of the {\it f}-wave spin-triplet pairing derived from the three-site cyclic-exchange ferromagnetic interactions. We point out that a triangular network of hopping integrals, which is required for the three-site cyclic hopping processes, is contained in the (possibly) spin-triplet superconducting systems, such as Bechgaard salts (TMTSF)$_2$X, cobalt oxide Na$_{0.35}$CoO$_2$$\cdot$1.3H$_2$O, and layered perovskite Sr$_2$RuO$_4$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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