A NEW MEAN-FIELD SUPERCONDUCTING PHASE IN 2-DIMENSIONAL T-J MODEL NEAR HALF-FILLING

Authors
OGATA M
Citation
M. Ogata, A NEW MEAN-FIELD SUPERCONDUCTING PHASE IN 2-DIMENSIONAL T-J MODEL NEAR HALF-FILLING, Journal of the Physical Society of Japan, 66(11), 1997, pp. 3375-3378
Citations number
20
Journal title
Journal of the Physical Society of Japan → ACNP
ISSN journal
00319015
Volume
66
Issue
11
Year of publication
1997
Pages
3375 - 3378
Database
ISI
SICI code
0031-9015(1997)66:11<3375:ANMSPI>2.0.ZU;2-4
Abstract
A new superconducting phase is found in the two-dimensional t-J model near half-filling within the mean-field theory and Gutzwiller approxim ation. This state has a spatial dependence of order parameters which i s interpreted as a mixing of the extended s-wave component with the fi nite total momentum in addition to the d(x2-y2)-wave symmetry. The ori gin of this peculiar pairing is investigated. There is no node in the gap function in the new state and possible experimental consequences a re discussed.