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arXiv 0709.2303cond-mat.str-elcond-mat.supr-con
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空穴掺杂的两腿Cu-O梯的Phase diagram

Phase diagram of hole doped two-leg Cu-O ladders

P. Chudzinski, M. Gabay, T. Giamarchi

摘要:

在弱耦合限制下,我们建立了一个两个腿的梯形与一个单位细胞包含铜和O原子,作为掺杂的函数的相图。我们使用玻色化和设计一个特定的RG程序来处理额外的自由度。显着的差异被发现与单轨道的情况下,纯粹的排斥相互作用,完全无质量的量子临界区是在中间载流子浓度(以及带内),其中的基态由一个不相称的模式的轨道电流加上自旋密度波(SDW)结构。

英文摘要:

In the weak coupling limit, we establish the phase diagram of a two-leg ladder with a unit cell containing both Cu and O atoms, as a function of doping. We use bosonization and design a specific RG procedure to handle the additional degrees of freedom. Significant differences are found with the single orbital case; for purely repulsive interactions, a completely massless quantum critical region is obtained at intermediate carrier concentrations (well inside the bands) where the ground state consists of an incommensurate pattern of orbital currents plus a spin density wave (SDW) structure.

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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