On the theory of pseudogap anisotropy in the cuprate superconductors

TL;DR

This paper presents a theoretical analysis of pseudogap anisotropy in cuprate superconductors, demonstrating that different Fourier components of the order parameter close or open at distinct finite temperatures due to phase fluctuations.

Contribution

It introduces a theory explaining how anisotropic order parameters in cuprates lead to multiple critical temperatures for different Fourier components.

Findings

Different Fourier components have separate critical temperatures.

The pseudogap closing occurs over a finite temperature range.

Phase fluctuations influence the anisotropic gap behavior.

Abstract

We show by means of the theory of the order parameter phase fluctuations that the temperature of "closing" (or "opening") of the gap (and pseudogap) in the electron spectra of superconductors with anisotropic order parameter takes place within a finite temperature range. Every Fourier-component of the order parameter has its own critical temperature.