Excitation spectra in periodic Anderson and Kondo lattices

被引：3

作者：

Maekawa, S. ^{[1
]}

Tsutsui, K. ^{[1
]}

Ohta, Y. ^{[1
]}

Dagotto, E. ^{[2
,3
]}

Riera, J. ^{[4
]}

机构：

[1] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 46401, Japan

[2] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

[3] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA

[4] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA

来源：

PHYSICA B-CONDENSED MATTER | 1995年 / 206卷

关键词：

D O I：

10.1016/0921-4526(94)00390-H

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The one-particle excitation spectra and the momentum distribution functions for the periodic Anderson and Kondo Lattices in one and two dimensions and their dependence on the electron density are studied by using the exact diagonalization method with twisted boundary conditions on clusters with six and eight unit cells. We find the following: in the insulating state there exist more low-energy excitations than expected for a non-interacting system with the mixing gap, and in the metallic state the heavy fermion band is formed by reconstructing the low-energy excitations in the insulating state upon doping of carriers but not by simply shifting the Fermi level. As a result, the momentum distribution function has two characteristic momenta.

引用

页码：147 / 150

页数：4

共 9 条

[1] EXACT-DIAGONALIZATION STUDY OF THE SPECTRAL-WEIGHT FUNCTIONS AND THE DENSITY-OF-STATES OF THE LATTICE ANDERSON MODEL [J].