The absorption coefficient of CuGeO3 was measured in the energy range of 1-4 eV, in a temperature interval between 300 and 20 K, for light polarized along the b and c crystal axes. A weak absorption band at 1.7 eV is attributed to copper d-d transitions partially allowed by electron-phonon interactions; this is followed by a region of transparency leading to a strong exponential edge above 3 eV, which is identified with the onset of charge-transfer transitions.
Optical absorption of CuGeO3 / Bassi, ; M. Camagni, P.; Rolli, R.; Samoggia, G.; Parmigiani, Fulvio; Dhalenne, G.; Revcolevschi, A.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - ELETTRONICO. - (1996), pp. 11030-11033.
Optical absorption of CuGeO3
PARMIGIANI, FULVIO;
1996-01-01
Abstract
The absorption coefficient of CuGeO3 was measured in the energy range of 1-4 eV, in a temperature interval between 300 and 20 K, for light polarized along the b and c crystal axes. A weak absorption band at 1.7 eV is attributed to copper d-d transitions partially allowed by electron-phonon interactions; this is followed by a region of transparency leading to a strong exponential edge above 3 eV, which is identified with the onset of charge-transfer transitions.Pubblicazioni consigliate
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