Short-range order in strongly correlated Fermi systems

被引：4
|
作者：
Kudasov, YB [1 ]
机构：
[1] Russian Fed Nucl Ctr, VNIIEF, Nizhnii Novgorod 607188, Russia
来源：
PHYSICS-USPEKHI | 2003年 / 46卷 / 02期
关键词：
D O I：
10.1070/PU2003v046n02ABEH001284
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The role of short-range order (SRO) in strongly correlated metallic systems is discussed. Magnetic neutron scattering experiments show that SRO is a universal property of such systems. Different theoretical approaches to the analysis of SRO are considered. Microscopic models based on infinite-dimensional lattice solutions (the Monte Carlo variational technique, the IID + 1/D-2 expansion for the Gutzwiller trial wave function, and the dynamical mean-field theory) do not correctly describe SRO in strongly correlated systems. A variational theory of SRO in Fermi systems is presented in which, in addition to Gutzwiller's variational parameter, a set of new parameters describing nonlocal short-range correlations is used.
引用
收藏
页码：117 / 138
页数：22
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