Specific heat of an S=1/2 Heisenberg ladder compound Cu2(C5H12N2)2Cl4 under magnetic fields

被引：43

作者：

Hagiwara, M ^{[1
]}

Katori, HA

Schollwöck, U

Mikeska, HJ

机构：

[1] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

[2] Univ Munich, Sekt Phys, D-80333 Munich, Germany

[3] Univ Hannover, Inst Theoret Phys, D-30167 Hannover, Germany

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.62.1051

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Specific heat measurements down to 0.5 K have been performed on a single crystal sample of a spin-ladder-like compound Cu-2(C5H12N2)(2)Cl-4 under magnetic fields up to 12 T. The temperature dependence of the observed data in a magnetic field below 6 T is well reproduced by numerical results calculated for the S = 1/2 two-leg ladder with J(rung)/J(leg) = 5. In the gapless region above 7 T (H-c1), the agreement between experiment and calculation is good above about 2 K and a sharp and a round peak were observed below 2 K in a magnetic field around 10 T, but the numerical data show only a round peak, the magnitude of which is smaller than that of the observed one.

引用

页码：1051 / 1057

页数：7

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