Fermi surface evolution in the antiferromagnetic state for the electron-doped t-t'-t''-J model

TL;DR

This study uses a slave-boson mean-field approach to analyze how the Fermi surface evolves with doping in the electron-doped t-t'-t''-J model's antiferromagnetic state, aligning well with experimental observations.

Contribution

It provides a detailed theoretical analysis of Fermi surface evolution in the electron-doped t-t'-t''-J model using the slave-boson mean-field method, matching experimental findings.

Findings

Fermi surface pockets appear around (±π,0) and (0,±π) at low doping.

Additional Fermi surface pockets form around (±π/2, ±π/2) with increased doping.

The spectral weight evolution agrees with experimental data.

Abstract

By use of the slave-boson mean-field approach, we have studied the electron-doped t-t'-t''-J model in the antiferromagnetic (AF) state. It is found that at low doping the Fermi surface (FS) pockets appear around $(\pm\pi,0)$ and $(0,\pm\pi)$, and upon increasing doping the other ones will form around $(\pm{\pi\over 2},\pm{\pi\over 2})$. The evolution of the FS with doping as well as the calculated spectral weight are consistent with the experimental results.