Spin-phonon coupling in CuGeO3

被引：74

作者：

Braden, M

Hennion, B

Reichardt, W

Dhalenne, G

Revcolevschi, A

机构：

[1] Forschungszentrum Karlsruhe, INFP, D-76021 Karlsruhe, Germany

[2] CE Saclay, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

[3] Univ Paris Sud, Chim Solide Lab, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.80.3634

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The lattice dynamics of the spin-Peierls (SP) system CuGeO3 have been analyzed by inelastic neutron scattering combined with shell model calculations, The low-lying modes of the symmetry of the structural distortion in the dimerized phase are identified and studied as a function of temperature. Surprisingly, the static distortion in the SP phase does not correspond to one eigenmode of the high symmetry phase. The two modes associated with the structural distortion exhibit frequency shifts and pronounced linewidth broadening well above the transition temperature; however, there is no soft mode behavior for these modes.

引用

页码：3634 / 3637

页数：4

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