Charge density wave memory in a cuprate superconductor

X. M. Chen (), C. Mazzoli, Y. Cao, V. Thampy, A. M. Barbour, W. Hu, M. Lu, T. A. Assefa, H. Miao, G. Fabbris, G. D. Gu, J. M. Tranquada, M. P. M. Dean (), S. B. Wilkins () and I. K. Robinson ()
Additional contact information
X. M. Chen: Brookhaven National Laboratory
C. Mazzoli: Brookhaven National Laboratory
Y. Cao: Brookhaven National Laboratory
V. Thampy: Brookhaven National Laboratory
A. M. Barbour: Brookhaven National Laboratory
W. Hu: Brookhaven National Laboratory
M. Lu: Brookhaven National Laboratory
T. A. Assefa: Brookhaven National Laboratory
H. Miao: Brookhaven National Laboratory
G. Fabbris: Brookhaven National Laboratory
G. D. Gu: Brookhaven National Laboratory
J. M. Tranquada: Brookhaven National Laboratory
M. P. M. Dean: Brookhaven National Laboratory
S. B. Wilkins: Brookhaven National Laboratory
I. K. Robinson: Brookhaven National Laboratory

Nature Communications, 2019, vol. 10, issue 1, 1-6

Abstract: Abstract Although CDW correlations are a ubiquitous feature of the superconducting cuprates, their disparate properties suggest a crucial role for pinning the CDW to the lattice. Here, we report coherent resonant X-ray speckle correlation analysis, which directly determines the reproducibility of CDW domain patterns in La1.875Ba0.125CuO4 (LBCO 1/8) with thermal cycling. While CDW order is only observed below 54 K, where a structural phase transition creates inequivalent Cu-O bonds, we discover remarkably reproducible CDW domain memory upon repeated cycling to far higher temperatures. That memory is only lost on cycling to 240(3) K, which recovers the four-fold symmetry of the CuO2 planes. We infer that the structural features that develop below 240 K determine the CDW pinning landscape below 54 K. This opens a view into the complex coupling between charge and lattice degrees of freedom in superconducting cuprates.

Date: 2019
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DOI: 10.1038/s41467-019-09433-1

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