Effective dimension of quasiparticle states and remnant Fermi surface in oxychlorides Ca_2CuO_2Cl_2 and Sr_2CuO_2Cl_2

TL;DR

This paper investigates the effective dimension of quasiparticle states and the remnant Fermi surface in oxychlorides Ca_2CuO_2Cl_2 and Sr_2CuO_2Cl_2, revealing formal similarities and scattering processes affecting spectral intensity.

Contribution

It introduces a method to analyze the spectral intensity contributions from quasiparticle states and remnant Fermi surfaces in oxychlorides, highlighting two-channel scattering processes.

Findings

Formal similarity between k-area contributions and remnant Fermi surface

Presence of 3B_{1g}- state contributions indicates two-channel scattering

Integration method reproduces remnant Fermi surface and spectral contributions

Abstract

Formal similarity between k- area for the contribution from ZR-states and the remnant Fermi surface has been found. Presence of the contribution from 3B_{1g}- states at other k- area means the two-channel processes of scattering. As consequence, the method of integration with a constant energy interval reproduces not only remnant Fermi surface at least, but one of the contributions of above states to the total spectral intensity