POSSIBLE D-LIKE SYMMETRY PAIRING STATES IN THE EXTENDED HUBBARD-MODEL

Authors
SZABO Z GULACSI Z
Citation
Z. Szabo et Z. Gulacsi, POSSIBLE D-LIKE SYMMETRY PAIRING STATES IN THE EXTENDED HUBBARD-MODEL, Philosophical magazine. B. Physics of condensed matter. Statistical mechanics, electronic, optical and magnetic, 76(5), 1997, pp. 833-837
Citations number
8
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
833 - 837
Database
ISI
SICI code
1364-2812(1997)76:5<833:PDSPSI>2.0.ZU;2-K
Abstract
Superconducting phases of the extended Hubbard model has been investig ated in the weak-coupling limit at different temperatures and doping l evels in the presence of on-site, nearest-neighbour and next-nearest-n eighbour couplings. The main result is the occurrence of stable pairin g states of different symmetries depending on the tunable parameters o f the model, attractive nearest-neighbour couplings give rise to a sta ble superconducting state having d(x2-y2) symmetry, while attractive n ext-nearest-neighbour interactions favour pairing states of d(xy) symm etry.