Kamarás, Katalin and Pergerné Klupp, Gyöngyi and Tanner, D. B. (2002) Ordered low-temperature structure in K4C60 detected by infrared spectroscopy. Physical Review B (Condensed Matter and Materials Physics), 65 (5). Paper-052103. ISSN 1098-0121
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Abstract
Infrared spectra of a K4C60 single-phase thin film have been measured between room temperature and 20 K. At low temperatures, the two high-frequency T-1u modes appear as triplets, indicating a static D-2h crystal-field stabilized Jahn-Teller distortion of the C-60(4-) anions, The T-1u(4) mode changes into a known doublet above 250 K, a pattern which could have three origins: a dynamic Jahn-Teller effect, static disorder between "staggered" anions, or a phase transition from an orientationally ordered phase to one where molecular motion is significant.
| Item Type: | Article |
|---|---|
| Subjects: | Q Science / természettudomány > QC Physics / fizika Q Science / természettudomány > QC Physics / fizika > QC06 Physics of condensed matter / szilárdtestfizika |
| SWORD Depositor: | MTMT SWORD |
| Depositing User: | MTMT SWORD |
| Date Deposited: | 29 Jul 2013 13:52 |
| Last Modified: | 29 Jul 2013 13:52 |
| URI: | http://real.mtak.hu/id/eprint/6048 |
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