Exactly solvable model of Fermi arcs and pseudogap

TL;DR

This paper presents a simple, exactly solvable model that reproduces key features of Fermi arcs and pseudogaps observed in high-temperature cuprate superconductors, providing insights into their ground state and excitation spectrum.

Contribution

It introduces a novel, exactly solvable theoretical model that captures Fermi arcs and pseudogaps, advancing understanding of cuprate phenomenology.

Findings

Supports Fermi arcs in ground state and spectrum

Fermi arcs merge into a pseudo Fermi surface with a pseudogap

Provides a framework consistent with cuprate experimental data

Abstract

We introduce a very simple and exactly solvable model that supports Fermi arcs in its ground state and excitation spectrum. These arcs come in pairs, and merge into what we call a pseudo Fermi surface along which fermions are gapped; this fermion gap is naturally identified as a pseudogap. Comparison will be made with phenomenology of high temperature cuprate superconductors.