High-Temperature Charge-Stripe Correlations in La_{1.675}Eu_{0.2}Sr_{0.125}CuO_{4}.

Autor: Wang Q; Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland., Horio M; Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland., von Arx K; Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland., Shen Y; State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China., John Mukkattukavil D; Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden., Sassa Y; Department of Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden., Ivashko O; Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland., Matt CE; Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.; Swiss Light Source, Photon Science Division, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland., Pyon S; Department of Advanced Materials, University of Tokyo, Kashiwa 277-8561, Japan., Takayama T; Department of Advanced Materials, University of Tokyo, Kashiwa 277-8561, Japan., Takagi H; Department of Advanced Materials, University of Tokyo, Kashiwa 277-8561, Japan., Kurosawa T; Department of Physics, Hokkaido University, Sapporo 060-0810, Japan., Momono N; Department of Physics, Hokkaido University, Sapporo 060-0810, Japan.; Department of Applied Sciences, Muroran Institute of Technology, Muroran 050-8585, Japan., Oda M; Department of Physics, Hokkaido University, Sapporo 060-0810, Japan., Adachi T; Department of Engineering and Applied Sciences, Sophia University, Tokyo 102-8554, Japan., Haidar SM; Department of Applied Physics, Tohoku University, Sendai 980-8579, Japan., Koike Y; Department of Applied Physics, Tohoku University, Sendai 980-8579, Japan., Tseng Y; Swiss Light Source, Photon Science Division, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland., Zhang W; Swiss Light Source, Photon Science Division, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland., Zhao J; State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.; Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China., Kummer K; European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38043 Grenoble, France., Garcia-Fernandez M; Diamond Light Source, Harwell Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom., Zhou KJ; Diamond Light Source, Harwell Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom., Christensen NB; Department of Physics, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark., Rønnow HM; Institute of Physics, École Polytechnique Fedérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland., Schmitt T; Swiss Light Source, Photon Science Division, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland., Chang J; Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2020 May 08; Vol. 124 (18), pp. 187002.
DOI: 10.1103/PhysRevLett.124.187002
Abstrakt: 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.
Databáze: MEDLINE