Self-energy renormalization around the flux phase in the $t-J$ model: Possible implications in underdoped cuprates

TL;DR

This paper investigates how self-energy renormalizations near the flux phase in the $t-J$ model can explain experimental features of the pseudogap regime in underdoped cuprates, highlighting anisotropic and incoherent spectral functions.

Contribution

It provides a detailed analysis of self-energy effects near the flux phase, offering insights into the pseudogap phenomena and reconciling theoretical predictions with experimental observations.

Findings

Spectral functions are anisotropic on the Fermi surface near the flux phase.

Spectral functions become very incoherent near the hot spots.

Temperature and doping influence self-energy and spectral features in line with experiments.

Abstract

The flux phase predicted by the $t-J$ model in the large-N limit exhibits features that make it a candidate for describing the pseudogap regime of cuprates. However certain properties, as for instance the prediction of well defined quasiparticle peaks, speak against this scenario. We have addressed these issues by computing self-energy renormalizations in the vicinity to flux phase. The calculated spectral functions show features similar to those observed in experiments. At low doping, near the flux phase, the spectral functions are anisotropic on the Fermi surface and very incoherent near the hot spots. The temperature and doping evolution of self-energy and spectral functions are discussed and compared with the experiment.