Tricritical to mean-field crossover at the spin-Peierls transition in CuGeO3

被引：11

作者：

Birgeneau, RJ

Kiryukhin, V

Wang, YJ

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

[2] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.60.14816

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The spin-Peierls phase transition in CuGeO3 has been extensively studied utilizing a variety of experimental techniques. Interpretations of the phase transition behavior vary from tricritical to mean field to Ising critical to XY critical. We show that the behavior in the vicinity of the phase transition of each of the order parameters, the magnetic energy gap, and the heat capacity can be quantitatively fitted with few adjustable parameters with a mean-field model incorporating a tricritical to mean-field crossover in the transition region. [S0163-1829(99)03246-4].

引用

收藏

页码：14816 / 14820

页数：5

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