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High-temperature charge-stripe correlations in La1.675Eu0.2Sr0.125CuO4

DOI: 10.1103/PhysRevLett.124.187002 DOI Help

Authors: Q. Wang (Universität Zürich) , M. Horio (Universität Zürich) , K. Von Arx (Universität Zürich) , Y. Shen (Fudan University) , D. John Mukkattukavil (Uppsala University) , Y. Sassa (Chalmers University of Technology) , O. Ivashko (Universität Zürich) , C. E. Matt (Swiss Light Source; Universität Zürich) , S. Pyon (University of Tokyo) , T. Takayama (University of Tokyo) , H. Takagi (University of Tokyo) , T. Kurosawa (Hokkaido University) , N. Momono (Hokkaido University; Muroran Institute of Technology) , M. Oda (Hokkaido University) , T. Adachi (Sophia University) , S. M. Haidar (Tohoku University) , Y. Koike (Tohoku University) , Y. Tseng (Swiss Light Source) , W. Zhang (Swiss Light Source) , J. Zhao (Fudan University; Collaborative Innovation Center of Advanced Microstructures) , K. Kummer (European Synchrotron Radiation Facility) , M. Garcia-fernandez (Diamond Light Source) , K. Zhou (Diamond Light Source; Swiss Light Source) , N. B. Christensen (Technical University of Denmark) , H. M. Ronnow (École Polytechnique Fedérale de Lausanne (EPFL)) , T. Schmitt (Swiss Light Source) , J. Chang (Universität Zürich)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Letters , VOL 124

State: Published (Approved)
Published: May 2020
Diamond Proposal Number(s): 20828 , 24481

Abstract: We use resonant inelastic x-ray scattering to investigate charge-stripe correlations in La 1.675 Eu 0.2 Sr 0.125 CuO 4 . 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 ( La 1.875 Ba 0.125 CuO 4 , La 1.475 Nd 0.4 Sr 0.125 CuO 4 , and La 1.875 Sr 0.125 CuO 4 ) 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 La 1.675 Eu 0.2 Sr 0.125 CuO 4 extend beyond the low-temperature tetragonal and pseudogap phase, their emergence heralds a spontaneous symmetry breaking in this compound.

Journal Keywords: Charge order; Cuprates; High-temperature superconductors; Resonant inelastic x-ray scattering

Subject Areas: Physics, Materials


Instruments: I21-Resonant Inelastic X-ray Scattering (RIXS)

Other Facilities: ID32 at ESRF