Femtosecond x rays link melting of charge-density wave correlations and light-enhanced coherent transport in YBa2Cu3O6.6

We use femtosecond resonant soft x-ray diffraction to measure the optically stimulated ultrafast changes of charge density wave correlations in underdoped YBa2Cu3O6.6. We find that when coherent interlayer transport is enhanced by optical excitation of the apical oxygen distortions, at least 50% of...

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Published inarXiv.org
Main Authors M Först A Frano, Kaiser, S, Mankowsky, R, Hunt, C R, Turner, J J, Dakovski, G L, Minitti, M P, Robinson, J, Loew, T, M Le Tacon, Keimer, B, Hill, J P, Cavalleri, A, Dhesi, S S
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 18.02.2015
Subjects
Charge density waves
Excitation
Interlayers
Physics - Superconductivity
Soft x rays
Superconductivity
Transition temperature
Wave diffraction
X-ray diffraction
YBCO superconductors
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Summary:We use femtosecond resonant soft x-ray diffraction to measure the optically stimulated ultrafast changes of charge density wave correlations in underdoped YBa2Cu3O6.6. We find that when coherent interlayer transport is enhanced by optical excitation of the apical oxygen distortions, at least 50% of the in-plane charge density wave order is melted. These results indicate that charge ordering and superconductivity may be competing up to the charge ordering transition temperature, with the latter becoming a hidden phase that is accessible only by nonlinear phonon excitation.
ISSN:2331-8422
DOI:10.48550/arxiv.1502.05343