High-Temperature Charge-Stripe Correlations in La1.675Eu0.2Sr0.125CuO4
Artikel i vetenskaplig tidskrift, 2020

We use resonant inelastic x-ray scattering to investigate charge-stripe correlations in La1.675Eu0.2Sr0.125CuO4. By differentiating elastic from inelastic scattering, it is demonstrated that charge-stripe correlations precede both the structural low-temperature tetragonal phase and the transport-defined pseudogap onset. The scattering peak amplitude from charge stripes decays approximately as T-2 towards our detection limit. The in-plane integrated intensity, however, remains roughly temperature independent. Therefore, although the incommensurability shows a remarkably large increase at high temperature, our results are interpreted via a single scattering constituent. In fact, direct comparison to other stripe-ordered compounds (La1.875Ba0.125CuO4, La1.475Nd0.4Sr0.125CuO4, and La1.875Sr0.125CuO4) suggests a roughly constant integrated scattering intensity across all these compounds. Our results therefore provide a unifying picture for the charge-stripe ordering in La-based cuprates. As charge correlations in La1.675Eu0.2Sr0.125CuO4 extend beyond the low-temperature tetragonal and pseudogap phase, their emergence heralds a spontaneous symmetry breaking in this compound.

X ray scattering

Copper compounds

Inelastic scattering

Författare

Qisi Wang

Universität Zürich

M. Horio

Universität Zürich

K. von Arx

Universität Zürich

Y. Shen

Fudan University

D. John Mukkattukavil

Uppsala universitet

Yasmine Sassa

Chalmers, Fysik, Materialfysik

O. Ivashko

Universität Zürich

C. E. Matt

Paul Scherrer Institut

Universität Zürich

S. Pyon

University of Tokyo

T. Takayama

University of Tokyo

H. Takagi

University of Tokyo

T. Kurosawa

Hokkaido University

N. Momono

Muroran Institute of Technology

Hokkaido University

M. Oda

Hokkaido University

T. Adachi

Sophia University

S. M. Haidar

Tohoku University

Y. Koike

Tohoku University

Y. Tseng

Paul Scherrer Institut

W. Zhang

Paul Scherrer Institut

J. Zhao

Collaborat Innovat Ctr Adv Microstruct

Fudan University

K. Kummer

European Synchrotron Radiation Facility (ESRF)

M. Garcia-Fernandez

Diamond Light Source

Ke-Jin Zhou

Diamond Light Source

N. B. Christensen

Danmarks Tekniske Universitet (DTU)

H. M. Ronnow

Ecole Polytech Federate Lausanne EPFL

T. Schmitt

Paul Scherrer Institut

J. Chang

Universität Zürich

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 124 18 187002

Ämneskategorier

Fysikalisk kemi

Atom- och molekylfysik och optik

Den kondenserade materiens fysik

DOI

10.1103/PhysRevLett.124.187002

Mer information

Senast uppdaterat

2020-08-28