OPTICAL INVESTIGATION OF THE MAGNETIC EXCITATIONS IN 2-DIMENSIONAL TRIANGULAR LATTICE ANTIFERROMAGNETS

被引：9

作者：

KOJIMA, N ^{[1
]}

ITO, K ^{[1
]}

MOGI, I ^{[1
]}

TAKEDA, M ^{[1
]}

KIDO, G ^{[1
]}

NAKAGAWA, Y ^{[1
]}

SAKAI, M ^{[1
]}

KURODA, N ^{[1
]}

NISHINA, Y ^{[1
]}

机构：

[1] TOHOKU UNIV, INST MAT RES, SENDAI, MIYAGI 980, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1993年 / 62卷 / 11期

关键词：

MAGNON SIDE-BAND; MAGNON RAMAN SCATTERING; SPIN FRUSTRATION; 2-DIMENSIONAL TRIANGULAR LATTICE; Z2-VORTEX; VX2; (X=CL; BR AND I); LICRO2;

D O I：

10.1143/JPSJ.62.4137

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated exciton-magnon absorption spectra in VX2 (X = Cl, Br and I) and LiCrO2 known as two-dimensional Heisenberg triangular lattice antiferromagnets (2DH TAL-AF) in order to study the effect of the peculiar spin frustration on the magnetic elementary excitations. In VX2 (X = Cl and Br) and LiCrO2, the temperature dependence of the line width of the exciton-magnon absorption resembles closely that of the density of the characteristic point defects known as Z2-vortex in 2DH TAL-AF. Thus the line width of the exciton magnon absorption in 2DH TAL-AF exhibits Z2-vortex induced broadening. We also reported the magnetic Raman scattering in VCl2 and VI2.

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页码：4137 / 4145

页数：9

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