Isotope effects in CuGeO3 studied by Raman spectroscopy
| Autor: | Ingo Loa, R. K. Kremer, Christian Thomsen, S. Gronemeyer |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Condensed matter physics
Chemistry Analytical chemistry General Chemistry Condensed Matter Physics symbols.namesake Phase (matter) Bound state Kinetic isotope effect Materials Chemistry symbols Condensed Matter::Strongly Correlated Electrons Coherent anti-Stokes Raman spectroscopy Raman spectroscopy |
| Zdroj: | Solid State Communications. 117:279-283 |
| ISSN: | 0038-1098 |
| DOI: | 10.1016/s0038-1098(00)00472-5 |
| Popis: | Effects of isotopic substitution of Cu and Ge in CuGeO3 are studied by Raman spectroscopy. We present detailed information on the isotope-induced shifts of nearly all Raman modes in the dimerized phase of CuGeO3. Our study unambiguously reveals phononic contributions to the asymmetric Raman peaks observed at 108 and 228 cm−1 which have been related to magnetic excitations previously. Furthermore, we observed an upshift by 0.9±0.1 cm−1 for the two-magnon bound state at 30 cm−1 in 65CuGeO3 compared to natCuGeO3. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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