SPIN FLUCTUATION CONTRIBUTION TO THE SPECIFIC-HEAT OF STRONGLY CORRELATED FERMIONS

被引：34

作者：

WOLFLE, P ^{[1
]}

LI, T ^{[1
]}

机构：

[1] UNIV FLORIDA, DEPT PHYS, GAINESVILLE, FL 32611 USA

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1990年 / 78卷 / 01期

关键词：

D O I：

10.1007/BF01317355

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We calculate the free energy of a system of fermions at low temperatures within the Hubbard model using a slave boson representation, which generalizes the approach of Kotliar and Ruckenstein. The mean field approximation is identical to Gutzwiller's solution. The one-loop corrections provide a T3 ln T spin fluctuation contribution to the specific heat, which reduces for weak coupling to the result of paramagnon theory first derived by Brenig et al. © 1990 Springer-Verlag.

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页码：45 / 50

页数：6

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