Journal Article

PUBDB-2025-03641

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Decoupling of static and dynamic charge correlations revealed by uniaxial strain in a cuprate superconductor

Martinelli, L. (Corresponding author)Extern*XFEL.EU* ; Biało, I. ; Hong, X.Extern* ; Oppliger, J.Extern* ; Lin, C.Extern* ; Schaller, T. ; Küspert, J.Extern* ; Fischer, M.Extern* ; Kurosawa, T. ; Momono, N. ; Oda, M. ; Novikov, D.DESY* ; Khadiev, A.Extern*DESY* ; Weschke, E. ; Choi, J. ; Agrestini, S.Extern* ; Garcia-Fernandez, M. ; Zhou, K.Extern*XFEL.EU* ; Wang, Q.Extern* ; Chang, J.Extern*

2025
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/n834-dkyh  doi:10.3204/PUBDB-2025-03641

Abstract: We use uniaxial strain in combination with ultra-high-resolution resonant inelastic x-ray scattering (RIXS) at the oxygen-$𝐾$ and copper-$𝐿_3$ edges to study the excitations stemming from the charge ordering wave vector in La$_{1.875}$Sr$_{0.125}$⁢CuO$_4$. 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.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-D (FS-PETRA-D)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: R-20240670 EC (R-20240670-EC) (R-20240670-EC)

Experiment(s):

1. PETRA Beamline P23 (PETRA III)

Appears in the scientific report 2025

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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