Role of dynamic Jahn-Teller distortions in Na2C60 and Na2CsC60 studied by NMR
Preprint
- 12 December 2000
Abstract
Through 13C NMR spin lattice relaxation (T1) measurements in cubic Na2C60, we detect a gap in its electronic excitations, similar to that observed in tetragonal A4C60. This establishes that Jahn-Teller distortions (JTD) and strong electronic correlations must be considered to understand the behaviour of even electron systems, regardless of the structure. Furthermore, in metallic Na2CsC60, a similar contribution to T1 is also detected for 13C and 133Cs NMR, implying the occurence of excitations typical of JT distorted C60^{2-} (or equivalently C60^{4-}). This supports the idea that dynamic JTD can induce attractive electronic interactions in odd electron systems.Keywords
All Related Versions
- Version 1, 2000-12-12, ArXiv
- Published version: Physical Review Letters, 86 (20), 4680.
This publication has 0 references indexed in Scilit: