Frohlich-interaction-induced multiphonon Raman scattering in SrCuO2 and Sr0.5Ca0.5CuO2

被引：30

作者：

Abrashev, MV ^{[1
]}

Litvinchuk, AP ^{[1
]}

Thomsen, C ^{[1
]}

Popov, VN ^{[1
]}

机构：

[1] UNIV SOFIA, FAC PHYS, BG-1126 SOFIA, BULGARIA

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.55.R8638

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polarized Raman spectra of Sr1-xCaxCuO2 (x=0, 0.5) microcrystals were studied experimentally. In addition to the Raman-allowed modes, we observed numerous lines with A(g) symmetry and frequencies up to 2400 cm(-1), which appear only for polarizations parallel to the chains. We show that this additional Raman scattering originates from the three infrared-active-only B-lu, LO modes and their overtones and combinations, becoming Raman active via Frohlich interaction.

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页码：R8638 / R8641

页数：4

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