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arXiv 0903.1697cond-mat.str-el
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非等价两足Hubbard梯的诱导阶

Induced Order in Nonequivalent Two-Leg Hubbard Ladder

Hiroyuki Yoshizumi, Takami Tohyama, Takao Morinari

摘要:

由于多层高温超导体中存在不同的有序结构,我们利用密度矩阵重整化群和平均场论研究了一个由两个不等价的Hubbard链通过链间跳跃耦合而成的模型.作为一个例子,我们考虑了一个无相互作用的无序链和一个具有强自旋-密度-波关联的Hubbard链的系统。我们发现,链间跳跃的大小控制着诱导有序的强度以及初始有序的强度及其涨落。研究还发现,诱导阶数随着初始阶数的增加而减小。多层系统的影响进行了讨论。

英文摘要:

Motivated by the presence of different orders in multilayered high-temperature superconductors, we examine a model consisting of nonequivalent two Hubbard chains coupled by interchain hopping by using the density-matrix renormalization group (DMRG) and a mean-field theory. As an example, we consider a system with noninteracting chain without order and a Hubbard chain with strong spin-density-wave correlation. We find that the magnitude of the interchain hopping controls the strength of induced order as well as that of original order and its fluctuation. It is also found that the induced order decreases with increasing the magnitude of the original order. Implications to the multilayered system are discussed.

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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