Jahn-Teller effects, adiabatic and nonadiabatic electron-phonon couplings and superconductivity in the doped C{sub 60}
- Electrotechnical Lab., Ibaraki (Japan)
The author previously showed that the nonadiabatic electron-intramolecular-vibration (e-mv) couplings can be mapped to Suhl-Kondo pair transfer interaction in multiband systems. Here, the author shows that the nonadiabatic coupling is large in the doped C{sub 60}. The author has studied the Jahn-Teller effects of C{sub 60}{sup {minus}} and also estimated the e-mv coupling constants with quantum chemical calculations of this anion. The adiabatic and nonadiabatic couplings are both large for the highest H{sub g} mode. The values of nonadiabatic coupling constants are as large as the adiabatic coupling constants. The author also found that the nonadiabatic effect is large in a class of Jahn-Teller systems where the Jahn-Teller splitting energy is comparable to the phonon energy like C{sub 60}{sup n{minus}}. As a results, it is concluded that the nonadiabatic e-mv coupling is important for the mechanism of superconductivity in the doped fullerene as well as the adiabatic e-mv coupling.
- OSTI ID:
- 127754
- Report Number(s):
- CONF-920376-; ISSN 0003-0503; TRN: 96:000253
- Journal Information:
- Bulletin of the American Physical Society, Vol. 37, Issue 9; Conference: Meeting of the American Physical Society, Indianapolis, IN (United States), 16-20 Mar 1992; Other Information: PBD: Dec 1992
- Country of Publication:
- United States
- Language:
- English
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