FULPROP: Electronic structure and physical properties of novel fullerene-based materials

• Unité de recherche: PCRD EU
• Numéro de projet: 97.0221
• Titre du projet anglais: FULPROP: Electronic structure and physical properties of novel fullerene-based materials

Mots-clé (Anglais)

Fullerene; endohedral fullerenes; fullerene networks; electronic structure; crystal structure; opto-electronic properties; charge transfer; superconductivity; magnetic properties

Autre Numéro de projet (Anglais)

EU project number: FMRXCT970155

Programme de recherche (Anglais)

EU-programme: 4. Frame Research Programme - 10.1 Stimulation of training and mobility

Description succincte (Anglais)

See abstract

Autres indications (Anglais)

Full name of research-institution/enterprise:
EPF Lausanne
Faculté des sciences de base
Institut de physique de la matière complexe (IPMC)

Partenaires et organisations internationales (Anglais)

IFW Dresden (D) (Contractor),
Université Paris-Sud (UPS) (F), Department of Physics, Uppsala University (Uppsala U.) (S), Ecole Polytechnique Fédérale de Lausanne (EPFL) (CH), Universität Wien (A),
Facultés Universitaires Notre-Dame de la Paix, ASBL (FUNDP) (B), University of Sussex (U. Sussex) (UK), Rijksuniversiteit Groningen (RUG) (NL), Consiglio Nazionale delle Ricerche (CNR) (I), Scuola Internazionale Superiore di Studi Avanzati (SISSA) (I)

Résumé des résultats (Abstract) (Anglais)

It has been demonstrated by NMR and ESSR measurements that the key feature behind th physics of cubic fullerides is due to an inter-play between strong electronic interaction and 'JT mediated electronic interactions'. Electronic correlations are essential for molecular excitations, such as the Jahn-Teller Distortion (JTD) to existe in the solid. JT mediated electronic interactions play in turn a crucial role in determining the insulating or metallic character of a given fullerene compound, by inducing repulsive interactions in even electron systems and attractive inter-actions in odd electron systems. The recent discovery of a way of doping continuously the C60 t1u level through a field-effect device might open a new path for checking this original behavior more systematically.

Références bases de données (Anglais)

Swiss Database: Euro-DB of the
State Secretariat for Education and Research
Hallwylstrasse 4
CH-3003 Berne, Switzerland
Tel. [phone]
Swiss Project-Number: 97.0221