Cold-spots and glassy nematicity in underdoped cuprates

TL;DR

This paper investigates how nematic glass states in underdoped cuprates influence quasiparticle spectra, explaining experimental observations of spectral features and local density of states through the interplay of cold-spots and nodal points.

Contribution

It introduces a model of superconducting nematic glass that accounts for spectral and local density of states features in underdoped cuprates, linking nematicity to observed electronic properties.

Findings

Nodal points coincide with nematic cold-spots on the Fermi surface.

The model reproduces key features of ARPES and STM measurements.

Nematic glass explains the spectral dichotomy in underdoped cuprates.

Abstract

There is now copious direct experimental evidence of various forms of (short-range) charge order in underdoped cuprate high temperature superconductors, and spectroscopic signatures of a nodal-antinodal dichotomy in the structure of the single-particle spectral functions. In this context, we analyze the Bogoliubov quasiparticle spectrum in a superconducting nematic glass. The coincidence of the superconducting "nodal points" and the nematic "cold-spots" on the Fermi surface naturally accounts for many of the most salient features of the measured spectral functions (from angle-resolved photoemission) and the local density of states (from scanning tunneling microscopy).