arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1504.01784cond-mat.str-elcond-mat.supr-con
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基于密度矩阵嵌入理论的正方格点哈伯德模型基态phase diagram

Ground-state phase diagram of the square lattice Hubbard model from density matrix embedding theory

Bo-Xiao Zheng, Garnet Kin-Lic Chan

摘要:

我们用密度矩阵嵌入理论计算了正方形晶格上Hubbard模型和受抑Hubbard模型的基态相图。我们提供了一个误差模型来估计计算的可靠性和图中不同点的物理复杂性。我们发现在基态的超导性,以及在低掺杂的非均匀电荷,自旋和配对状态之间的竞争。在研究中的估计误差低于T $_c$的铜酸盐和规模的贡献,在实际材料中被忽略的哈伯德模型。

英文摘要:

We compute the ground-state phase diagram of the Hubbard and frustrated Hubbard models on the square lattice with density matrix embedding theory using clusters of up to 16 sites. We provide an error model to estimate the reliability of the computations and complexity of the physics at different points in the diagram. We find superconductivity in the ground-state as well as competition between inhomogeneous charge, spin, and pairing states at low doping. The estimated errors in the study are below T$_c$ in the cuprates and on the scale of contributions in real materials that are neglected in the Hubbard model.

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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