Dependence of ARPES of High Tc Superconductors on the Spin Fluctuation Susceptibility

TL;DR

This paper investigates how ARPES spectra of high-temperature superconductors are influenced by spin fluctuation susceptibility, revealing a connection between spectral features and magnetic properties in the superconducting state.

Contribution

It introduces a model incorporating inelastic spin fluctuation processes and superconducting correlations to explain ARPES spectral features in high-Tc superconductors.

Findings

The broad background in ARPES may originate from inelastic spin fluctuation emission.

The dip feature indicates the presence of a spin gap in the superconducting state.

Spectral weight calculations support the role of spin fluctuations in ARPES spectra.

Abstract

ARPES measurements on HiTc superconductors such as BiSrCaCuO reveal a quasiparticle peak, a broad background and a dip. The background may originate from inelastic spin fluctuation emission. Calculations of the spectral weight are presented incorporating these inelastic processes. Superconducting correlations have been included in the magnetic susceptibility. The dip feature in the spectral weight is evidence for a spin gap in the superconducting state.