Vortex structure in d-density wave scenario of pseudogap

TL;DR

This paper explores the vortex structure within the d-density wave model of the pseudogap phase, revealing significant modifications to order parameters and local density of states, and explaining experimental asymmetries near vortex cores.

Contribution

It provides a detailed analysis of vortex profiles and local electronic properties in the d-density wave scenario, including effects of impurities and competition with superconductivity.

Findings

Modified vortex charge and density of states compared to pure superconductors

Asymmetry of the gap near vortex cores explained by the d-density wave model

Impurity effects on vortex structure analyzed

Abstract

We investigate the vortex structure assuming the d-density wave scenario of the pseudogap. We discuss the profiles of the order parameters in the vicinity of the vortex, effective vortex charge and the local density of states. We find a pronounced modification of these quantities when compared to a purely superconducting case. Results have been obtained for a clean system as well as in the presence of a nonmagnetic impurity. We show that the competition between superconductivity and the density wave may explain some experimental data recently obtained for high-temperature superconductors. In particular, we show that the d-density wave scenario explains the asymmetry of the gap observed in the vicinity of the vortex core.