The nature of spectral gaps due to pair formation

TL;DR

This paper derives a self-energy model based on pair formation in two dimensions to explain the pseudogap in cuprates, comparing it with experimental data and exploring implications for magneto-oscillations and vortex structures.

Contribution

It provides a theoretical derivation of the self-energy due to pair formation in 2D cuprates and applies it to interpret experimental phenomena.

Findings

Self-energy derived matches photoemission data

Explains the persistence of magneto-oscillations despite the pseudogap

Supports the two-length-scale vortex structure in underdoped cuprates

Abstract

Several phenomenological self-energies have been presented to describe the pseudogap in cuprates. Here, we offer a derivation of the self-energy in two dimensions due to pair formation and compare it to photoemission data. We then use our results to address several questions of interest, including the existence of magneto-oscillations in the presence of the pseudogap, and the two length scale nature of vortices in underdoped cuprates.