Fate of charge order in overdoped La-based cuprates
Journal article, 2023
In high-temperature cuprate superconductors, stripe order refers broadly to a coupled spin and charge modulation with a commensuration of eight and four lattice units, respectively. How this stripe order evolves across optimal doping remains a controversial question. Here we present a systematic resonant inelastic x-ray scattering study of weak charge correlations in La2−xSrxCuO4 and La1.8−xEu0.2SrxCuO4. Ultra high energy resolution experiments demonstrate the importance of the separation of inelastic and elastic scattering processes. Long-range temperature-dependent stripe order is only found below optimal doping. At higher doping, short-range temperature-independent correlations are present up to the highest doping measured. This transformation is distinct from and preempts the pseudogap critical doping. We argue that the doping and temperature-independent short-range correlations originate from unresolved electron–phonon coupling that broadly peaks at the stripe ordering vector. In La2−xSrxCuO4, long-range static stripe order vanishes around optimal doping and we discuss both quantum critical and crossover scenarios.
Author
Karin von Arx
Chalmers, Physics, Materials Physics
University of Zürich
Q. Wang
University of Zürich
S. Mustafi
University of Zürich
Daniel G. Mazzone
Laboratory for Neutron Scattering, Villigen
M. Horio
University of Tokyo
Deepak John Mukkattukavil
Uppsala University
E. Pomjakushina
Paul Scherrer Institut
S. Pyon
University of Tokyo
T. Takayama
Max Planck Society
H. Takagi
University of Tokyo
Max Planck Society
T. Kurosawa
Hokkaido University
N. Momono
Muroran Institute of Technology
Hokkaido University
M. Oda
Hokkaido University
N. B. Brookes
European Synchrotron Radiation Facility (ESRF)
Davide Betto
European Synchrotron Radiation Facility (ESRF)
W. Zhang
Paul Scherrer Institut
T. C. Asmara
Paul Scherrer Institut
Y. Tseng
Paul Scherrer Institut
T. Schmitt
Paul Scherrer Institut
Yasmine Sassa
Chalmers, Physics, Materials Physics
J. Chang
University of Zürich
npj Quantum Materials
23974648 (eISSN)
Vol. 8 1 7Realization of Novel Low‐Dimensional Skyrmion Systems
Swedish Research Council (VR) (2017-05078), 2019-06-01 -- 2021-12-31.
Subject Categories
Condensed Matter Physics
DOI
10.1038/s41535-023-00539-w