Circulating-current states and ring-exchange interactions in cuprates

Details Circulating-current states and ring-exchange interactions in cuprates Circulating-current states and ring-exchange interactions in cuprates

2004-03-18

arxiv.org/abs/cond-mat/0403481v2

Phys. Rev. B 70, 134407 (2004).

Physics

Condensed Matter

Strongly Correlated Electrons

14 pages, 11 figures

Scientific paper

10.1103/PhysRevB.70.134407

We consider the consequences for circulating-current states of a cyclic, four-spin, ``ring-exchange'' interaction of the type shown recently to be significant in cuprate systems. The real-space Hartree-Fock approach is used to establish the existence of charge-current and spin-current phases in a generalized Hubbard model for the CuO_2 planes in cuprates. We compare the results of the Hartree-Fock approximation with the correlated states renormalized by Gutzwiller projection factors which allows us to gauge the qualitative effects of projection to no double site occupancy. We find that charge flux states may be competitive in cuprates, whereas spin flux states are suppressed in the strongly correlated regime. We then include the ring-exchange interaction and demonstrate its effect on current-carrying states both at and away from half-filling.

Affiliated with

Also associated with

No associations

Rating

Circulating-current states and ring-exchange interactions in cuprates 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 Circulating-current states and ring-exchange interactions in cuprates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circulating-current states and ring-exchange interactions in cuprates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-525071