Study of gossamer superconductivity and antiferromagnetism in the t-J-U model

Details Study of gossamer superconductivity and antiferromagnetism in the t-J-U model Study of gossamer superconductivity and antiferromagnetism in the t-J-U model

2004-09-22

arxiv.org/abs/cond-mat/0409596v2

Physics

Condensed Matter

Superconductivity

7 pages, 8 figures

Scientific paper

10.1103/PhysRevB.71.104505

The d-wave superconductivity (dSC) and antiferromagnetism are analytically studied in a renormalized mean field theory for a two dimensional t-J model plus an on-site repulsive Hubbard interaction $U$. The purpose of introducing the $U$ term is to partially impose the no double occupancy constraint by employing the Gutzwiller approximation. The phase diagrams as functions of doping $\delta$ and $U$ are studied. Using the standard value of $t/J=3.0$ and in the large $U$ limit, we show that the antiferromagnetic (AF) order emerges and coexists with the dSC in the underdoped region below the doping $\delta\sim0.1$. The dSC order parameter increases from zero as the doping increases and reaches a maximum near the optimal doping $\delta\sim0.15$. In the small $U$ limit, only the dSC order survives while the AF order disappears. As $U$ increased to a critical value, the AF order shows up and coexists with the dSC in the underdoped regime. At half filing, the system is in the dSC state for small $U$ and becomes an AF insulator for large $U$. Within the present mean field approach, We show that the ground state energy of the coexistent state is always lower than that of the pure dSC state.

Affiliated with

Also associated with

No associations

Rating

Study of gossamer superconductivity and antiferromagnetism in the t-J-U model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Study of gossamer superconductivity and antiferromagnetism in the t-J-U model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Study of gossamer superconductivity and antiferromagnetism in the t-J-U model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-442447