Stability of staggered flux state for anisotropic triangular lattice
Stability of staggered flux state for anisotropic triangular lattice
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各向异性三角晶格交错通量状态的稳定性
DOI：
10.1016/j.phpro.2014.09.004
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
and M. Ogata
中科院分区：
文献类型：
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作者：
H. Yokoyama;S. Tamura;and T. Watanabe;K. Kobayashi;and M. Ogata
鉴于在有机层状超导体κ-(BEDT-TTf)2X中发现的类赝隙行为，我们研究了关联交错磁通态相对于通常的关联费米海作为支撑非传统超导电性的低位正常态的稳定性。为了处理强关联，我们将变分蒙特卡罗方法应用于各向异性三角晶格上的Hubbard模型，并构造了大Fu/t的正常态相图，所得结果与非掺杂κ-(BEDT-TTf)2盐的特性定性一致。
In view of pseudogap-like behavior found in organic layered superconductorsκ-(BEDT-TTF)2X, we study the stability of correlated staggered flux state, which may bring about pseudogap behavior, with respect to the ordinary correlated Fermi sea as a low-lying normal state that underlies the unconventional superconductivity. To treat strong correlations, we apply a variational Monte Carlo method to a Hubbard model on a anisotropic triangular lattice, and construct a phase diagram of the normal state for large values ofU/t. The results are qualitatively consistent with the features of non-dopedκ-(BEDT-TTF)2salts.