Folded modes in the infrared spectra of the spin-Peierls phase of CuGeO_3

M. N. Popova, A. B. Sushkov, S. A. Golubchik +2

Polarized far-infrared transmittance spectra of CuGeO_3 single crystals were measured at different temperatures (6K < T < 300K). Two spectral lines, at 284.2 cm-1 in E||c polarizat…