Dynamical cluster approximation study of electron localization in the extended Hubbard model
Dynamical cluster approximation study of electron localization in the extended Hubbard model
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DOI：
10.1103/physrevb.104.085129
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发表时间：
2021-05
影响因子：
3.7
通讯作者：
H. Terletska;S. Iskakov;T. Maier;E. Gull
中科院分区：
文献类型：
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作者：
H. Terletska;S. Iskakov;T. Maier;E. Gull
本文利用2× 2团簇的动力学团簇近似，对扩展Hubbard模型中的相变和电子局域化机制进行了详细的研究.我们探讨的相互作用的电荷秩序和莫特物理。我们发现，最近邻库仑相互作用V导致“屏蔽”效应接近莫特相变，推动相边界到更大的值的U。我们还展示了不同的影响V的相关性在金属和绝缘制度，并记录不同的相关方面的电荷顺序和莫特状态。
We perform a detailed study of the phase transitions and mechanisms of electron localization in the extended Hubbard model using the dynamical cluster approximation on a 2× 2 cluster. We explore the interplay of charge order and Mott physics. We find that a nearest-neighbor Coulomb interaction V causes “screening” effects close to the Mott phase transition, pushing the phase boundary to larger values of U . We also demonstrate the different effects of V on correlations in metallic and insulating regimes, and document the different correlation aspects of charge order and Mott states.