d-wave superconductivity and its coexistence with antiferromagnetism in the t–J–U model : statistically consistent Gutzwiller approach

doi:10.1103/PhysRevB.88.094502

d-wave superconductivity and its coexistence with ...

Bibliographic description

punktacja MNiSW [2013 A]: 35

title:	d-wave superconductivity and its coexistence with antiferromagnetism in the t–J–U model : statistically consistent Gutzwiller approach
author:	Abram Marcin , Kaczmarczyk Jan , Jędrak Jakub, Spałek Józef
Journal title:	Physical Review. B, Condensed Matter and Materials Physics
volume:	88
issue:	9
date of publication:	2013
article ID:	094502
ISSN:	1098-0121
eISSN:	1550-235X 1538-4489
DOI:	10.1103/PhysRevB.88.094502
language:	English
Journal language:	English
abstract in english:	We discuss the coexistence of antiferromagnetism and d-wave superconductivity within the so-called statistically consistent Gutzwiller approximation (SGA) applied to the t–J–U model. In this approach, the averages calculated in a self-consistent manner coincide with those determined variationally. Such consistency is not guaranteed within the standard renormalized mean-field theory. With the help of SGA, we show that for the typical value J/\left \| t \right \|=\frac{1}{3}, coexistence of antiferromagnetism (AF) and superconductivity (SC) appears only for U/\left \| t \right \|> 10.6 and in a very narrow range of doping \left ( \delta _{\sim }^{<} 0.006 \right ) in the vicinity of the Mott insulating state, in contrast to some previous reports. In the coexistent AF+SC phase, a staggered spin-triplet component of the superconducting gap appears also naturally; its value is very small.
number of pulisher's sheets:	1
affiliation:	Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego
type:	journal article
subtype:	academic paper