TY  - JOUR
AU  - Foerst, Michael
AU  - Tobey, R. I.
AU  - Bromberger, H.
AU  - Wilkins, S. B.
AU  - Khanna, V.
AU  - Caviglia, A. D.
AU  - Chuang, Y.-D.
AU  - Lee, W. S.
AU  - Schlotter, W. F.
AU  - Turner, J. J.
AU  - Minitti, M. P.
AU  - Krupin, O.
AU  - Xu, Z. J.
AU  - Wen, J. S.
AU  - Gu, G. D.
AU  - Dhesi, S. S.
AU  - Cavalleri, A.
AU  - Hill, J. P.
TI  - 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
JO  - Physical review letters
VL  - 112
IS  - 15
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - PUBDB-2016-03173
SP  - 157002
PY  - 2014
AB  - 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<sub>1.875</sub>Ba<sub>0.125</sub>CuO<sub>4</sub>. 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<sub>1.675</sub>Eu<sub>0.2</sub>Sr<sub>0.125</sub>CuO<sub>4</sub>. In La<sub>1.875</sub>Ba<sub>0.125</sub>CuO<sub>4</sub>, 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000334597300013
C6  - pmid:24785066
DO  - DOI:10.1103/PhysRevLett.112.157002
UR  - https://bib-pubdb1.desy.de/record/307319
ER  -