Mott-Hubbard transition in alkali ammonia fullerides

Authors
Takenobu, T Muro, T Iwasa, Y Mitani, T
Citation
T. Takenobu et al., Mott-Hubbard transition in alkali ammonia fullerides, SYNTH METAL, 121(1-3), 2001, pp. 1173-1174
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SYNTHETIC METALS
ISSN journal
03796779 → ACNP
Volume
121
Issue
1-3
Year of publication
2001
Pages
1173 - 1174
Database
ISI
SICI code
0379-6779(20010315)121:1-3<1173:MTIAAF>2.0.ZU;2-7
Abstract
Monoammoniated alkali fullerides salt (NH3)K3-xRbxC60 (0 less than or equal to x less than or equal to 3), forming an isostructual orthorhombic series followed by a Mott-Hubbard type antiferromagnetic transition. The Neel tem perature T,was found to first increase with the interfullerene spacing and then decreases for (NH3)Rb3C60, forming a maximum at 76K. This behavior can not be understood by a simple localized electron model and provides direct evidence for the important role of electron correlation effects.