The pseudogap ground state in high temperature superconductors

TL;DR

This paper re-analyzes ARPES data to show that the pseudogap ground state in high-temperature superconductors is an arc metal, aligning with other spectroscopic results and explaining Fermi pockets via a pseudogapped bilayer Fermi surface.

Contribution

It provides a new interpretation of the pseudogap ground state as an arc metal and explains Fermi pockets through a pseudogapped bilayer Fermi surface, integrating multiple experimental findings.

Findings

Pseudogap ground state is an arc metal in the superconducting region.

Consistent with Raman, specific heat, and NMR results.

Explains Fermi pockets as a pseudogapped bilayer Fermi surface.

Abstract

By re-examining recently-published data from angle-resolved photoemission spectroscopy we demonstrate that, in the superconducting region of the phase diagram, the pseudogap ground state is an arc metal. This scenario is consistent with results from Raman spectroscopy, specific heat and NMR. In addition, we propose an explanation for the "Fermi pockets" inferred from quantum oscillations in terms of a pseudogapped bilayer Fermi surface.