High-Temperature Charge-Stripe Correlations in La1.675Eu0.2Sr0.125CuO4

Qisi Wang*, M. Horio, K. Von Arx, Y. Shen, D. John Mukkattukavil, Y. Sassa, O. Ivashko, C. E. Matt, S. Pyon, T. Takayama, H. Takagi, T. Kurosawa, N. Momono, M. Oda, T. Adachi, S. M. Haidar, Y. Koike, Yu-Pei Tseng, W. Zhang, Jianming ZhaoK. Kummer, M. Garcia-Fernandez, Ke-Jin Zhou, Niels Bech Christensen, H.M. Rønnow, T. Schmitt, J. Chang

*Corresponding author for this work

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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 lowerature 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 lowerature tetragonal and pseudogap phase, their emergence heralds a spontaneous symmetry breaking in this compound.
Original languageEnglish
Article number187002
JournalPhysical Review Letters
Issue number18
Number of pages7
Publication statusPublished - 2020


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