Paring density waves as the origin of a ring-like RIXS profile in Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$

TL;DR

This paper explains the ring-like RIXS profile in Bi$_2$Sr$_2$CaCu$_2$O$_{8+eta}$ by proposing that the coexistence of a uniform d-wave gap and short-range pairing density waves causes the observed charge order pattern.

Contribution

It introduces a model where pairing density waves coexist with a d-wave gap to explain the RIXS observations in cuprate superconductors.

Findings

The ring-like RIXS profile results from short-range pairing density waves.

Coexistence of d-wave gap and PDW explains charge order in cuprates.

Model matches experimental RIXS data in Bi2212.

Abstract

The coexistence of a homogeneous d-wave gap and short-ranged pairing density waves (PDW) accounts for the apparent "ring" charge order in all directions of the copper oxide plane, observed by recent RIXS measurements in Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$