Fate of charge order in overdoped La-based cuprates
Artikel i vetenskaplig tidskrift, 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.

Författare

Karin von Arx

Chalmers, Fysik, Materialfysik

Universität Zürich

Q. Wang

Universität Zürich

S. Mustafi

Universität Zürich

Daniel G. Mazzone

Laboratory for Neutron Scattering, Villigen

M. Horio

University of Tokyo

Deepak John Mukkattukavil

Uppsala universitet

E. Pomjakushina

Paul Scherrer Institut

S. Pyon

University of Tokyo

T. Takayama

Max-Planck-Gesellschaft

H. Takagi

University of Tokyo

Max-Planck-Gesellschaft

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, Fysik, Materialfysik

J. Chang

Universität Zürich

npj Quantum Materials

23974648 (eISSN)

Vol. 8 1 7

Framtidens Lågdimensionella Skyrmion Material

Vetenskapsrådet (VR) (2017-05078), 2019-06-01 -- 2021-12-31.

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1038/s41535-023-00539-w

Mer information

Senast uppdaterat

2023-02-07