THERMODYNAMIC QUANTITIES OF THE ONE-DIMENSIONAL HUBBARD-MODEL AT FINITE TEMPERATURES

被引：62

作者：

USUKI, T ^{[1
]}

KAWAKAMI, N ^{[1
]}

OKIJI, A ^{[1
]}

机构：

[1] KYOTO UNIV,FUNDAMENTAL PHYS RES INST,KYOTO 606,JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1990年 / 59卷 / 04期

关键词：

Bethe Ansatz method; charge excitation; Hubbard model; numerical calculation; thermodynamic quantity;

D O I：

10.1143/JPSJ.59.1357

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The thermodynamic quantities of the 1D Hubbard model are investigated exactly by means of the Bethe Ansatz solution at finite temperatures. For an arbitrary electron concentration, the magnetic susceptibility, the charge susceptibility and the specific heat are calculated numerically as a function of temperature. On the basis of the obtained results, the characteristic behavior, which appears in the charge excitation near half-filling, is discussed, and is understood to be closely related to the gap formation of the Mott-type insulator. © 1990, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

引用

页码：1357 / 1365

页数：9

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