RAMAN-SCATTERING OF CUGEO3

被引：25

作者：

UDAGAWA, M ^{[1
]}

AOKI, H ^{[1
]}

OGITA, N ^{[1
]}

FUJITA, O ^{[1
]}

SOHMA, A ^{[1
]}

OGIHARA, A ^{[1
]}

AKIMITSU, J ^{[1
]}

机构：

[1] AOYAMA GAKUIN UNIV, DEPT PHYS, TOKYO 157, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1994年 / 63卷 / 11期

关键词：

RAMAN SCATTERING; SPIN-PEIERLS TRANSITION; CUGEO3; PHONON; MAGNETIC EXCITATION; POLARIZATION DEPENDENCE;

D O I：

10.1143/JPSJ.63.4060

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Polarization and temperature dependence of Raman scattering spectra of CuGeO3 has been measured from room temperature to 5 K. The observed phonons at room temperature are well assigned by the group theoretical estimation for Pbmm(D-2h(5)). The qualitative change for all possible Raman scattering spectra has not been found from room temperature to 14 K. The energy of the five inter-chain phonons increases with decreasing temperature. Below spin-Peierls transition temperature T-sp( 14 K), five peaks at 27, 107, 230, 370, and 820 cm(-1) have been observed for the (c, c) geometry while the peaks at 370 and 820 cm(-1) appear for (b, c).

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页码：4060 / 4064

页数：5

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