Fermi surface dichotomy on systems with fluctuating order

TL;DR

This paper explores how a dynamical collective mode influences quasiparticles at specific wavevectors, explaining the coexistence of charge order signatures and Fermi surface observations in underdoped cuprates.

Contribution

It introduces a model where a collective mode couples selectively to quasiparticles, elucidating the apparent contradiction between charge order evidence and Fermi surface measurements.

Findings

Shadow spectral features at high energies due to collective mode coupling

Low energy quasiparticles remain largely unaffected

Reconciliation of charge order signatures with Fermi surface data in cuprates

Abstract

We investigate the effect of a dynamical collective mode coupled with quasiparticles at specific wavevectors only. This coupling describes the incipient tendency to order and produces shadow spectral features at high energies, while leaving essentially untouched the low energy quasiparticles. This allows to interpret seemingly contradictory experiments on underdoped cuprates, where many converging evidences indicate the presence of charge (stripe or checkerboard) order, which remains instead elusive in the Fermi surface obtained from angle-resolved photoemission experiments.