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Title: Wavelength-dependent optical enhancement of superconducting interlayer coupling in La1.885Ba0.115CuO4

We analyze the pump wavelength dependence for the photo-induced enhancement of interlayer coupling in La1.885Ba0.115CuO4, 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 THz spectroscopy reveals a photo-induced blue-shift of the Josephson Plasma Resonance after excitation with optical pulses polarized perpendicular to the CuO2 planes. In the striped, non-superconducting state (TC < T < TSO ≃ 40 K) a transient plasma resonance similar to that seen below TC appears from a featureless equilibrium reflectivity. Most strikingly, both these effects become stronger upon tuning of the pump wavelength from the mid-infrared to the visible, underscoring an unconventional competition between stripe order and superconductivity, which occurs on energy scales far above the ordering temperature.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [3] ;  [4]
  1. Max Planck Society, Hamburg (Germany). Max Planck Inst. for the Structure and Dynamics of Matter; Center for Free Electron Laser Science, Hamburg (Germany)
  2. Max Planck Society, Hamburg (Germany). Max Planck Inst. for the Structure and Dynamics of Matter; Center for Free Electron Laser Science, Hamburg (Germany); Diamond Light Source (United Kingdom); Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  4. Max Planck Society, Hamburg (Germany). Max Planck Inst. for the Structure and Dynamics of Matter; Center for Free Electron Laser Science, Hamburg (Germany); Univ. of Oxford (United Kingdom)
Publication Date:
OSTI Identifier:
1226026
Report Number(s):
BNL--108203-2015-JA
Journal ID: ISSN 1098-0121; R&D Project: PO010; KC0201060
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 17; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY