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arXiv 0808.0733cond-mat.str-el
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LaMnO $_3$是一种莫特绝缘体:精确定义和评估局部相互作用强度

LaMnO$_3$ is a Mott Insulator: an precise definition and an evaluation of the local interaction strength

Chungwei Lin, Andrew. J. Millis

摘要:

我们比较了在LaMnO $_3$上测得的相互作用参数与驱动Mott转变所需的临界相关强度的单站点动态平均场估计,发现总相关强度(电子-电子加电子-晶格)非常接近但略大于临界值,而如果忽略电子-晶格相互作用,则模型是金属的。我们的研究结果强调了额外的物理,包括屈曲的Mn-O-Mn键的重要性。

英文摘要:

We compare the interaction parameters measured on LaMnO$_3$ to single site dynamical mean field estimates of the critical correlation strength needed to drive a Mott transition, finding that the total correlation strength (electron-electron plus electron-lattice) is very close to but slightly larger than the critical value, while if the electron lattice interaction is neglected the model is metallic. Our results emphasize the importance of additional physics including the buckling of the Mn-O-Mn bonds.

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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