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.
ASJC Scopus subject areas
- Physics and Astronomy(all)