Effect of magnetic frustration on single-hole spectral function in the t-t'-t''-J model

TL;DR

This study investigates how magnetic frustration affects the single-hole spectral function in the t-t'-t''-J model, revealing suppression of quasiparticle weight and temperature-dependent spectral features consistent with experimental data.

Contribution

It provides a detailed analysis of magnetic frustration's impact on spectral functions using ED and SCBA methods, highlighting new insights into cuprate electronic states.

Findings

Magnetic frustration suppresses quasiparticle weight at small momentum.

Quasiparticle peak at (pi/2, pi/2) remains sharp despite frustration.

Spectral lineshapes at different momenta show distinct temperature dependence.

Abstract

We examine the effect of the magnetic frustration J' on the single-hole spectral function in the t-t'-t''-J model. At zero temperature, the exact diagonalization (ED) and the self-consistent Born approximation (SCBA) methods are used. We find that the frustration suppresses the quasiparticle (QP) weight at small momentum k, whereas the QP peak at k=(pi/2,pi/2) remains sharp. We also show the temperature dependence of the single-hole spectral function by using the ED method. It is found that the lineshapes at (pi/2,0) and (pi/2,pi/2) show different temperature dependence. These findings are consistent with the angle-resolved photoemission data on Sr2CuO2Cl2, and indicate the importance of the magnetic frustration on the electronic states of the insulating cuprates.