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.
Inelastic scattering
X ray scattering
Copper compounds
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 Polytechnique Federale de Lausanne (EPFL)
T. Schmitt
Paul Scherrer Institut
J. Chang
Universität Zürich
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 124 18 187002Ämneskategorier
Fysikalisk kemi
Atom- och molekylfysik och optik
Den kondenserade materiens fysik
DOI
10.1103/PhysRevLett.124.187002