High-temperature charge density wave correlations in La1.875Ba0.125CuO4 without spin–charge locking

  • Although all superconducting cuprates display charge-ordering tendencies, their low-temperature properties are distinct, impeding efforts to understand the phenomena within a single conceptual framework. While some systems exhibit stripes of charge and spin, with a locked periodicity, others host charge density waves (CDWs) without any obviously related spin order. Here we use resonant inelastic X-ray scattering to follow the evolution of charge correlations in the canonical stripe-ordered cuprate La1.875Ba0.125CuO4 across its ordering transition. We find that high-temperature charge correlations are unlocked from the wavevector of the spin correlations, signaling analogies to CDW phases in various other cuprates. This indicates that stripe order at low temperatures is stabilized by the coupling of otherwise independent charge and spin density waves, with important implications for the relation between charge and spin correlations in the cuprates.

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Author: Hu Miao, José LorenzanaORCiD, Götz Seibold, Yingying Peng, Andrea Amorese, Flora Yakhou-Harris, Kurt Kummer, Nicholas B. Brookes, R. M. Konik, Vivek Thampy, G. D. Gu, Giacomo Claudio Ghiringhelli, Lucio Braicovich, M. P. M. Dean
URL:http://www.pnas.org/content/early/2017/10/31/1708549114.abstract
DOI:https://doi.org/10.1073/pnas.1708549114
ISSN:1091-6490
ISSN:0027-8424
Title of the source (English):Proceedings of the National Academy of Sciences of the United States of America PNAS
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2017
Tag:X-rays; charge density waves; cuprates; high-temperature superconductivity; stripes
Volume/Year:114
Issue number:47
First Page:12430
Last Page:12435
Faculty/Chair:Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Computational Physics
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