Similarity of slow stripe fluctations between Sr-doped cuprates and oxygen-doped nickelates

TL;DR

This study compares stripe fluctuations in oxygen-doped nickelates and cuprates using La-139 NMR, revealing temperature-dependent behaviors that are consistent with neutron data and suggest a commonality in stripe dynamics across these materials.

Contribution

It provides the first detailed NMR analysis of stripe fluctuations in La2NiO4.17, highlighting similarities with cuprates and offering new insights into their temperature-dependent stripe behavior.

Findings

Stripe fluctuations peak below 230K

Stripe signals diminish around 140K

Stripe signals recover at 4K

Abstract

Stripe fluctuations in La2NiO4.17 have been studied by 139La NMR using the field and temperature dependence of the linewidth and relaxation rates. In the formation process of the stripes the NMR line intensity is maximal below 230K, starts to diminish around 140K, disappears around 50K and recovers at 4K. These results are shown to be consistent with, but completely complementary to neutron measurements, and to be generic for oxygen doped nickelates and underdoped cuprates.