Manifestations of the pseudogap in the BOSON-FERMION model for Bose-Einstein condensation driven Superconductivity

TL;DR

This paper investigates how the pseudogap phenomenon manifests in the boson-fermion model for Bose-Einstein condensation driven superconductivity, analyzing its effects on various physical properties as temperature varies.

Contribution

It provides a detailed characterization of the pseudogap behavior and its evolution into a true gap within the boson-fermion model, linking it to observable physical quantities.

Findings

Pseudogap develops into a true gap as temperature decreases.

The pseudogap influences the temperature dependence of specific heat.

The model predicts changes in NMR relaxation rate and optical conductivity.

Abstract

The normal state behaviour of the density of states of the electrons described by the BOSON - FERMION model for Bose-Einstein condensation driven superconductivity is characterized by the appearence of a pseudogap which developes into a true gap upon lowering the temperature and the superconducting critical temperature is approached. The consequences of this on the temperature dependence of the specific heat, the NMR relaxation rate and the optical conductivity is examined.