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arXiv 1208.4044cond-mat.str-elcond-mat.mtrl-sci
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强关联电子:模型参数的估计

Strongly correlated electrons: Estimates of model parameters

Olle Gunnarsson

摘要:

讨论了模型哈密顿量中重整化参数的确定问题。一个简单的模型的3D化合物进行了研究,它示出了如何更高的状态可以投射出来,从而在一个更简单的模型与重整化参数。这是适用于计算有效的库仑积分的3d和4f化合物。在这种方法中遗漏的影响进行了讨论。然后,我们专注于富勒烯和比较库仑相互作用和电子-声子强度的理论和实验数据。

英文摘要:

The determination of renormalized parameters in model Hamiltonians is discussed. A simple model of a 3d compound is studied, and it is shown how higher states can be projected out, resulting in a simpler model with renormalized parameters. This is applied to the calculation of effective Coulomb integrals for 3d and 4f compounds. Effects left out in this approach are discussed. We then focus on fullerides and compare theoretical and experimental data for the Coulomb interaction and the electron-phonon strength.

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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