Non-rigid hole band in the extended t-J model

Details Non-rigid hole band in the extended t-J model Non-rigid hole band in the extended t-J model

1996-06-07

arxiv.org/abs/cond-mat/9606043v1

Physics

Condensed Matter

14 pages, LaTeX, 6 figures on request, submitted to Zeitschrift fuer Physik

Scientific paper

10.1007/s002570050299

The dispersion of one hole in an extended $t$-$J$ model with additional hopping terms to second and third nearest neighbours and a frustration term in the exchange part has been investigated. Two methods, a Green's function projection technique describing a magnetic polaron of minimal size and the exact diagonalization of a $4*4$ lattice, have been applied, showing reasonable agreement among each other. Using additional hopping integrals which are characteristic for the CuO$_2$ plane in cuprates we find in the nonfrustrated case an isotropic minimum of the dispersion at the point $(\pi/2,\pi/2)$ in $k$-space in good coincidence with recent angle-resolved photoemission results for the insulating compound Sr$_2$CuO$_2$Cl$_2$. Including frustration or finite temperature which shall simulate the effect of doping, the dispersion is drastically changed such that a flat region and an extended saddle point may be observed between $(\pi/2,0)$ and $(\pi,0)$ in agreement with experimental results for the optimally doped cuprates.

Affiliated with

Also associated with

No associations

Rating

Non-rigid hole band in the extended t-J 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 Non-rigid hole band in the extended t-J model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-rigid hole band in the extended t-J model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-724198