STRUCTURAL EVIDENCE FOR A SPIN PEIERLS GROUND-STATE IN THE QUASI-ONE-DIMENSIONAL COMPOUND CUGEO3

被引：234

作者：

POUGET, JP

REGNAULT, LP

AIN, M

HENNION, B

RENARD, JP

VEILLET, P

DHALENNE, G

REVCOLEVSCHI, A

机构：

[1] UNIV PARIS 11,INST ELECTR FONDAMENTALE,F-91405 ORSAY,FRANCE

[2] UNIV PARIS 11,CHIM SOLIDE LAB,F-91405 ORSAY,FRANCE

[3] CEN,COMMISSARIAT ENERGIE ATOM,DEPT RECH FONDAMENTALE MATIERE CONDENSEE SPSMS MDN,F-38054 GRENOBLE 9,FRANCE

[4] CENS,LAB LEON BRILLOUIN,F-91191 GIF SUR YVETTE,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.72.4037

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

X-ray and elastic neutron scattering measurements reveal that the quasi-one-dimensional Cu2+(S = 1/2) antiferromagnet CuGeO3 undergoes a second order structural transition towards a dimerized ground state at the same temperature, T(SP) = 14 K, at which the magnetic susceptibility abruptly decreases. X-ray diffuse scattering measurements show that the critical fluctuations are quasi one dimensional on a large temperature range above T(SP). These results show unambiguously that CuGeO3 undergoes a true spin-Peierls transition triggered by the magnetic chains.

引用

页码：4037 / 4040

页数：4

共 31 条

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