TY  - JOUR
AU  - Martinelli, Leonardo
AU  - Biało, I.
AU  - Hong, Xinguo
AU  - Oppliger, Jens
AU  - Lin, Chuanlong
AU  - Schaller, T.
AU  - Küspert, J.
AU  - Fischer, Matthias
AU  - Kurosawa, T.
AU  - Momono, N.
AU  - Oda, M.
AU  - Novikov, Dmitri
AU  - Khadiev, A.
AU  - Weschke, E.
AU  - Choi, J.
AU  - Agrestini, Stefano
AU  - Garcia-Fernandez, M.
AU  - Zhou, Kejin
AU  - Wang, Q.
AU  - Chang, Johan
TI  - Decoupling of static and dynamic charge correlations revealed by uniaxial strain in a cuprate superconductor
JO  - Physical review / B
VL  - 112
IS  - 4
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - PUBDB-2025-03641
SP  - L041124
PY  - 2025
AB  - We use uniaxial strain in combination with ultra-high-resolution resonant inelastic x-ray scattering (RIXS) at the oxygen-𝐾 and copper-𝐿<sub>3</sub> edges to study the excitations stemming from the charge ordering wave vector in La<sub>1.875</sub>Sr<sub>0.125</sub>⁢CuO<sub>4</sub>. By detwinning stripe ordering, we demonstrate that the optical phonon anomalies do not show any stripe anisotropy. The low-energy charge excitations also retain an in-plane fourfold symmetry. As such, we find that both phonon and charge excitations are decoupled entirely from the strength of static charge ordering. The almost isotropic character of charge excitations is indicative of a quantum critical behavior and remains a possible source for the strange metal properties found in the normal state of cuprate superconductors.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1103/n834-dkyh
UR  - https://bib-pubdb1.desy.de/record/636259
ER  -