Journal Article

PUBDB-2016-03055

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Wavelength-Dependent Optical Enhancement of Superconducting Interlayer Coupling in $La_{1.885}Ba_{0.115}CuO_4$

Casandruc, E. (Corresponding author)CFEL*MPG* ; Nicoletti, D.CFEL*MPG* ; Rajasekaran, S.CFEL*MPG* ; Laplace, Y.Extern* ; Khanna, V.CFEL*MPG* ; Gu, G. D. ; Hill, J. P. ; Cavalleri, A.CFEL*MPG*

2015
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevB.91.174502

Abstract: We analyze the pump wavelength dependence for the photoinduced enhancement of interlayer coupling in $La_{1.885}Ba_{0.115}CuO_4$, which is promoted by optical melting of the stripe order. In the equilibrium superconducting state (T <TC = 13 K) in which stripes and superconductivity coexist, time-domain terahertz spectroscopy reveals a photoinduced blueshift of the Josephson plasma resonance after excitation with optical pulses polarized perpendicular to the CuO$_2$ planes. In the striped nonsuperconducting state (TC < T < TSO ≃ 40 K) a transient plasma resonance similar to that seen belowTC appears from a featureless equilibrium reflectivity. Most strikingly, both these effects become stronger upon tuning of the pump wavelength from the midinfrared to the visible, underscoring an unconventional competition between stripe order and superconductivity, which occurs on energy scales far above the ordering temperature.

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Contributing Institute(s):

1. Forschungsgruppe für strukturelle Dynamik (MPSD)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)
2. Q-MAC - Frontiers in Quantum Materials Control (319286) (319286)

Experiment(s):

1. No specific instrument

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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