Optical Investigation of the Magnetic Excitations in Two-Dimensional Triangular Lattice Antiferromagnets

Iwao Mogi, Masayasu Takeda, Giyuu Kido, Yasuaki Nakagawa, Masamichi Sakai, Noritaka Kuroda, Yuichiro Nishina, Kozo Ito, Norimichi Kojima

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Abstract

We have investigated exciton-magnon absorption spectra in VX2 (X=C1, Br and I) and LiCr02 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=C1 and Br) and LiCr02, 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 VC12 and VI2.

Original languageEnglish
Pages (from-to)4137-4145
Number of pages9
Journaljournal of the physical society of japan
Volume62
Issue number11
DOIs
Publication statusPublished - 1993 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Mogi, I., Takeda, M., Kido, G., Nakagawa, Y., Sakai, M., Kuroda, N., Nishina, Y., Ito, K., & Kojima, N. (1993). Optical Investigation of the Magnetic Excitations in Two-Dimensional Triangular Lattice Antiferromagnets. journal of the physical society of japan, 62(11), 4137-4145. https://doi.org/10.1143/JPSJ.62.4137