Raman, infrared and optical spectra of the spin-Peierls compound NaV2O5

被引：62

作者：

Golubchik, SA ^{[1
]}

Isobe, M

Ivlev, AN

Mavrin, BN

Popova, MN

Sushkov, AB

Ueda, Y

Vasil'ev, AN

机构：

[1] Russian Acad Sci, Inst Spect, Troitsk 142092, Russia

[2] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 162, Japan

[3] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, Russia

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1997年 / 66卷 / 12期

关键词：

NaV2O5; spin-Peierls transition; phonons; Raman spectra; FIR transmission; d-electrons;

D O I：

10.1143/JPSJ.66.4042

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured polarized spectra of Raman scattering, infrared and optical transmission of NaV2O5 single crystals above the temperature of the spin-Peierls transition T-SP = 35 K. Some of the far-infrared (FIR) phonon lines are strongly asymmetric, due to the spin-phonon interaction. In addition to the phonon lines, a broad band was observed in the c(aa)(c) over bar Raman spectrum and in the Ella FIR transmission spectrum. A possible origin of these bands is discussed. The absorption band at 10000 cm(-1) (1.25eV) is attributed to vanadium d-d electronic transitions while the absorption edge above 3eV is supposed to correspond to the onset of charge-transfer transitions.

引用

页码：4042 / 4046

页数：5