Normal Fermi Liquid Behavior of Quasiholes in the Spin-Polaron Model for Copper Oxides

TL;DR

This paper demonstrates that quasiholes in the spin-polaron model for copper oxides exhibit Fermi liquid behavior, with damping characteristics consistent with traditional Fermi liquids, contrasting earlier claims of marginal Fermi liquid behavior.

Contribution

The study provides a detailed calculation showing Fermi liquid damping behavior of quasiholes in the t-J model, incorporating spin-wave renormalization effects.

Findings

Quasihole damping follows Fermi liquid form $ ext{Im}\Sigma \,\propto \,\epsilon^{2} \ln \epsilon$

Contrasts with previous marginal Fermi liquid reports

Supports Fermi liquid theory in low doping copper oxides

Abstract

Based on the t-J model and the self-consistent Born approximation, the damping of quasiparticle hole states near the Fermi surface is calculated in a low doping regime. Renormalization of spin-wave excitations due to hole doping is taken into account. The damping is shown to be described by a familiar form $\text{Im}\Sigma({\bf k}^{\prime},\epsilon)\propto (\epsilon^{2}/ \epsilon_{F})\ln(\epsilon/ \epsilon_{F})$ characteristic of the 2-dimensional Fermi liquid, in contrast with the earlier statement reported by Li and Gong [Phys. Rev. B {\bf 51}, 6343 (1995)] on the marginal Fermi liquid behavior of quasiholes.