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Folded modes in the infrared spectra of the spin-Peierls phase of CuGeO_3 | | M. N. Popova
; A. B. Sushkov
; S. A. Golubchik
; A. N. Vasil’ev
; L. L. Leonyuk
; | | Date: |
29 Sep 1997 | | Journal: | Phys. Rev. B, 57 (1998) 5040 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | 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 polarization and at 311.7 cm-1 in E||b polarization, appear at the temperature of the spin-Peierls transition and grow in intensity with decreasing temperature. Both of them are, most probably, folded modes of the dimerized lattice. We discuss a possible role of the spin-phonon interaction in the formation of the 311.7 cm-1 feature. | | Source: | arXiv, cond-mat/9709312 | | Services: | Forum | Review | PDF | Favorites | |
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