SUPERCONDUCTIVITY IN THE EXTENDED HUBBARD-MODEL WITH MORE THAN NEAREST-NEIGHBOR CONTRIBUTIONS

Authors
SZABO Z GULACSI Z
Citation
Z. Szabo et Z. Gulacsi, SUPERCONDUCTIVITY IN THE EXTENDED HUBBARD-MODEL WITH MORE THAN NEAREST-NEIGHBOR CONTRIBUTIONS, Philosophical magazine. B. Physics of condensed matter.Statistical mechanics, electronic, optical and magnetic, 76(6), 1997, pp. 911-928
Citations number
50
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
6
Year of publication
1997
Pages
911 - 928
Database
ISI
SICI code
1364-2812(1997)76:6<911:SITEHW>2.0.ZU;2-9
Abstract
Superconducting phase diagram of the extended Hubbard model supplement ed with interaction and hopping terms exceeding the nearest-neighbour distance in range is analysed systematically at different band filling and temperature values in a mean-field approximation. The obtained re sults clearly emphasize the importance of next-nearest-neighbour terms in developing the main superconducting phases of different symmetries at a given point of the phase diagram; in particular, critical temper atures T-c, zero temperature gap amplitude values Delta(0), Delta(0)/T -c ratios, doping and temperature dependences are all strongly influen ced by next-nearest-neighbour contributions.