Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1997-02-03
Physics
Condensed Matter
Strongly Correlated Electrons
8 pages, Revtex.
Scientific paper
10.1103/PhysRevB.56.6320
We explore the success of various versions of the one-band t-J model in explaining the full spectral functions found in angle-resolved photoemission spectra for the prototypical, quasi two-dimensional, tetragonal, antiferromagnetic insulator $Sr_2CuO_2Cl_2$. After presenting arguments justifying our extraction of $A(k,\omega)$ from the experimental data, we rely on exact-diagonalization results from studies of a square 32-site lattice, the largest cluster for which such information is presently available, to perform this comparison. Our work leads us to believe that (i) a one-band model that includes hopping out to third-nearest neighbours, as well three-site, spin-dependent hopping, can indeed explain not only the dispersion relation, but also the quasiparticle lifetimes -- only in the neighbourhood of $k = (\pi/2,0)$ do we find disagreement; (ii) an energy-dependent broadening function, $\Gamma (E) = \Gamma_0 + A E$, is important in accounting for the incoherent contributions to the spectral functions.
Gooding R. J.
Leung P. W.
Wells Barrett O.
No associations
LandOfFree
Comparison of 32-site exact diagonalization results and ARPES spectral functions for the AFM insulator $Sr_2CuO_2Cl_2$ 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 Comparison of 32-site exact diagonalization results and ARPES spectral functions for the AFM insulator $Sr_2CuO_2Cl_2$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparison of 32-site exact diagonalization results and ARPES spectral functions for the AFM insulator $Sr_2CuO_2Cl_2$ will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-223454