KAPPA-(BEDT-TTF)(2)X ORGANICS (BEDT-TTF EQUIVALENT-TO BIS(ETHYLENEDITHIO)TETRATHIAFULVALENE), AS SEEN FOR HUBBARDISTS

Authors
IVANOV V
Citation
V. Ivanov, KAPPA-(BEDT-TTF)(2)X ORGANICS (BEDT-TTF EQUIVALENT-TO BIS(ETHYLENEDITHIO)TETRATHIAFULVALENE), AS SEEN FOR HUBBARDISTS, Philosophical magazine. B. Physics of condensed matter. Statistical mechanics, electronic, optical and magnetic, 76(5), 1997, pp. 697-713
Citations number
48
Categorie Soggetti
Physics, Applied",Mechanics,"Physics, Condensed Matter","Material Science
Journal title
Philosophical magazine. B. Physics of condensed matter. Statistical mechanics, electronic, optical and magnetic → ACNP
ISSN journal
13642812
Volume
76
Issue
5
Year of publication
1997
Pages
697 - 713
Database
ISI
SICI code
1364-2812(1997)76:5<697:KO
Abstract
The kappa-(BEDT-TTF)(2)X salts (BEDT-TTF = bis (ethylenedithio)tetrath iafulvalene) are classified as strongly correlated electron systems. T herefore the electronic structure is calculated on the basis of the ti ght-binding approach previously developed for correlated electrons. It is shown that intradimer electron interactions provide the insulating state of system. An insulator-metal phase transition of Mott-Hubbard kind is derived. Based on the electronic band symmetry in metallic sta te, the anisotropic superconducting pairing of different symmetries is studied. The results obtained are in agreement with available experim ental data and theoretical speculations.