Anomalous dispersion relations in the staggered flux state

TL;DR

This paper investigates quasiparticle dispersion in various states of the 2D t-J model, highlighting how the staggered flux state can explain anomalous dispersion features observed experimentally, and suggesting it as a candidate for pseudogap phenomena.

Contribution

It demonstrates that the staggered flux state can account for anomalous dispersion relations and may serve as a symmetry-breaking pseudogap state coexisting with d-wave superconductivity.

Findings

Qualitatively consistent quasiparticle dispersion results with experiments when including the SF state.

Staggered flux order can explain anomalous dispersion relations around the antinodal region.

SF order is a potential candidate for the pseudogap state.

Abstract

We study the quasiparticle properties in the d-wave superconductivity, antiferromagnetism, and the staggered flux state within a renormalized mean-field theory based on the two-dimensional t-J model. In particular, we focus on the anomalous quasiparticle dispersion relations around the antinodal region of the Brillouin zone argued in Hashimoto et al., Nature Phys. 6, 414 (2010). We obtain the qualitatively consistent results with their observations when we take account of the SF state. The present analysis shows that the SF order can be a possible candidate of symmetry-breaking pseudogap states coexisting with the dSC.