en
Scientific article
Open access
English

Melting of Charge Stripes in Vibrationally Driven La1.875Ba0.125CuO4 : Assessing the Respective Roles of Electronic and Lattice Order in Frustrated Superconductors

Published inPhysical review letters, vol. 112, no. 15, 157002
Publication date2014-04-17
First online date2014-04-17
Abstract

We report femtosecond resonant soft x-ray diffraction measurements of the dynamics of the charge order and of the crystal lattice in nonsuperconducting, stripe-ordered La 1.875 Ba 0.125 CuO 4 . Excitation of the in-plane Cu-O stretching phonon with a midinfrared pulse has been previously shown to induce a transient superconducting state in the closely related compound La 1.675 Eu 0.2 Sr 0.125 CuO 4 . In La 1.875 Ba 0.125 CuO 4 , we find that the charge stripe order melts promptly on a subpicosecond time scale. Surprisingly, the low temperature tetragonal (LTT) distortion is only weakly reduced, reacting on significantly longer time scales that do not correlate with light-induced superconductivity. This experiment suggests that charge modulations alone, and not the LTT distortion, prevent superconductivity in equilibrium.

eng
Affiliation Not a UNIGE publication
Research group
Citation (ISO format)
FÖRST, M. et al. Melting of Charge Stripes in Vibrationally Driven La<sub>1.875</sub>Ba<sub>0.125</sub>CuO<sub>4</sub> : Assessing the Respective Roles of Electronic and Lattice Order in Frustrated Superconductors. In: Physical review letters, 2014, vol. 112, n° 15, p. 157002. doi: 10.1103/PhysRevLett.112.157002
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal0031-9007
216views
53downloads

Technical informations

Creation03/07/2022 2:12:00 PM
First validation03/07/2022 2:12:00 PM
Update time03/16/2023 2:48:08 AM
Status update03/16/2023 2:48:07 AM
Last indexation05/06/2024 10:19:24 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack