Charge Order Lock-in by Electron-Phonon Coupling in La${}_{1.675}$Eu${}_{0.2}$Sr${}_{0.125}$CuO${}_4$

Abstract

We report an ultrahigh resolution resonant inelastic x-ray scattering (RIXS) study of the in-plane bond-stretching phonon mode in stripe-ordered cuprate La${}_{1.675}$Eu${}_{0.2}$Sr${}_{0.125}$CuO${}_4$. Phonon softening and lifetime shortening are found around the charge ordering wave vector. In addition to these self-energy effects, the electron-phonon coupling is probed by its proportionality to the RIXS cross section. We find an enhancement of the electron-phonon coupling around the charge-stripe ordering wave vector upon cooling into the low-temperature tetragonal structure phase. These results suggest that in addition to electronic correlations, electron-phonon coupling contributes significantly to the emergence of long-range charge-stripe order in cuprates.

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• Fate of charge order in overdoped La-based cuprates
• Superconductivity from charge order in cuprates
• Structure of Charge Density Waves in La${}_{1.875}$Ba${}_{0.125}$CuO${}_4$
• Low-energy quasi-circular electron correlations with charge order wavelength in ${\text{Bi}}_2{\text{Sr}}_2\text{Ca}{\text{Cu}}_2{\text{O}}_{8+\delta }$
• Topological Doping and Superconductivity in Cuprates: An Experimental Perspective
• Magnon interactions in a moderately correlated Mott insulator
• Theory of electron-phonon interactions in extended correlated systems probed by resonant inelastic x-ray scattering
• Periodic Atomic Displacements and Visualization of the Electron-Lattice Interaction in the Cuprate
• Probing enhanced superconductivity in van der Waals polytypes of V${}_x$TaS${}_2$
• Bulk charge density wave and electron-phonon coupling in superconducting copper oxychlorides
• A Theoretical Study of Doping Evolution of Phonons in High-Temperature Cuprate Superconductors
• Charge density waves and pinning by lattice anisotropy in 214 cuprates
• Tuning competition between charge order and superconductivity in the square-lattice $t$-$t^{\prime }$-$J$ model
• Selective coupling of coherent optical phonons in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ with electronic transitions
• Dynamic charge order from strong correlations in the cuprates
• The influence of phonon symmetry and electronic structure on the electron-phonon coupling momentum dependence in cuprates
• La${}_{2-x}$Ba${}_x$CuO${}_4$ as a superconducting Rosetta Stone