Generalized Spectral Signatures of Electron Fractionalization in Quasi-One and -Two Dimensional Molybdenum Bronzes and Superconducting Cuprates

TL;DR

This paper demonstrates generalized spectral signatures of electron fractionalization in quasi-one- and two-dimensional molybdenum bronzes and cuprates, highlighting Luttinger liquid behavior and proposing a 'melted holon' scenario for background features.

Contribution

It introduces a unified analysis of electron fractionalization signatures across different dimensional systems, including a novel 'melted holon' model for background spectra.

Findings

Li purple bronze exhibits Luttinger liquid behavior in photoemission.

Signatures of electron fractionalization are observed in quasi-two-dimensional systems.

The 'melted holon' scenario explains background features in photoemission spectra.

Abstract

We establish the quasi-one-dimensional Li purple bronze as a photoemission paradigm of Luttinger liquid behavior. We also show that generalized signatures of electron fractionalization are present in the angle resolved photoemission spectra for quasi-two-dimensional purple bronzes and certain cuprates. An important component of our analysis for the quasi-two-dimensional systems is the proposal of a ``melted holon'' scenario for the k-independent background that accompanies but does not interact with the peaks that disperse to define the Fermi surface.