Persistence of pseudogap formation in quasi-2D systems with arbitrary carrier density

TL;DR

This paper demonstrates that the pseudogap phase persists in quasi-2D systems with arbitrary carrier density, even when considering coherent interlayer tunneling, highlighting its robustness in high-temperature superconductor models.

Contribution

It shows that the pseudogap phase remains in quasi-2D systems with interlayer tunneling, extending previous 2D models to more realistic layered structures.

Findings

Pseudogap persists with interlayer tunneling

Effective anisotropy increases with carrier density

Pseudogap robustness in quasi-2D systems

Abstract

The existence of a pseudogap above the critical temperature has been widely used to explain the anomalous behaviour of the normal state of high-temperature superconductors. In two dimensions the existence of a pseudogap phase has already been demonstrated in a simple model. It can now be shown that the pseudogap phase persists even for the more realistic case where coherent interlayer tunneling is taken into account. The effective anisotropy is surprisingly large and even increases with increasing carrier density.