Thermodynamic properties of the dimerized and frustrated S=1/2 chain

被引：19

作者：

Bühler, A ^{[1
]}

Löw, U ^{[1
]}

Uhrig, GS ^{[1
]}

机构：

[1] Univ Cologne, Inst Theoret Phys, Zulpicher Str 77, D-50937 Cologne, Germany

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.64.024428

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By high-temperature series expansion, exact diagonalization, and temperature density-matrix renormalization the magnetic susceptibility chi (T) and the specific heat C(T) of dimerized and frustrated S= 1/2 chains are computed. All three methods yield reliable results, in particular, for not too small temperatures or not too small gaps. The series-expansion results are provided in the form of polynomials allowing very fast and convenient fits in data analysis using algebraic programs. We discuss the difficulty to extract more than two coupling constants from the temperature dependence of chi (T).

引用

页数：12

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