Checkerboard charge density wave and pseudogap in high-$T_{c}$ cuprates

TL;DR

This paper investigates a specific charge density wave in underdoped cuprates, constrains its form, and links it to the pseudogap phenomenon, providing theoretical and experimental insights into high-temperature superconductivity.

Contribution

It proves a theorem constraining the CDW form factor and demonstrates its relevance to experimental observations in cuprates.

Findings

A specific CDW form factor fits ARPES and STM data

The large pseudogap may result from this charge order

Theoretical constraints on CDW form factors in cuprates

Abstract

We consider the scenario where a 4-lattice constant, rotationally symmetric charge density wave (CDW) is present in the underdoped cuprates. We prove a theorem that puts strong constraint on the possible form factor of such a CDW. We demonstrate, within mean-field theory, that a particular form factor within the allowed class describes the angle-resolved photoemission and scan tunneling spectroscopy well. We conjecture that the ``large pseudogap'' in cuprates is the consequence of this type of charge density wave.