The pseudogap in underdoped high Tc superconductors in the framework of the Boson Fermion model

TL;DR

This paper investigates the origin of the pseudogap in underdoped high-temperature superconductors using the Boson-Fermion model, proposing signatures for a two-component scenario that can be tested experimentally.

Contribution

It introduces a two-component scenario for the pseudogap in cuprates within the Boson-Fermion model, linking spectral features to experimental signatures.

Findings

Identification of a three-peak structure in the spectral function

Prediction of temperature-dependent Fermi vector shifts

Proposal of experimental tests via ARPES and BIS

Abstract

The question of whether the pseudogap in high $T_c$ cuprates is related to super conducting precursor effects or to the existence of extrinsic bosonic massive excitations is investigated on the basis of the Boson-Fermion model. The characteristic three peak structure of the electronic spectral function and the temperature dependent Fermi vector derived here are signatures for a two component scenario which can be tested by ARPES and BIS experiments.