Isosbestic points in the spectral function of correlated electrons

被引：25

作者：

Eckstein, Martin ^{[1
]}

Kollar, Marcus ^{[1
]}

Vollhardt, Dieter ^{[1
]}

机构：

[1] Univ Augsburg, Ctr Elect Correlat & Magnetism, Inst Phys, D-86135 Augsburg, Germany

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2007年 / 147卷 / 3-4期

关键词：

D O I：

10.1007/s10909-007-9311-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the properties of the spectral function A(omega,U) of correlated electrons within the Hubbard model and dynamical mean-field theory. Curves of A(omega,U) versus omega for different values of the interaction U are found to intersect near the band-edges of the non-interacting system. For a wide range of U the crossing points are located within a sharply confined region. The precise location of these "isosbestic points" depends on details of the non-interacting band structure. Isosbestic points of dynamic quantities therefore provide valuable insights into microscopic energy scales of correlated systems.

引用

页码：279 / 293

页数：15

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