Optically induced superconductivity in striped La2-xBaxCuO4 by polarization-selective excitation in the near infrared

Abstract

We show that superconducting interlayer coupling, which coexists with and is depressed by stripe order in La1.885Ba0.115CuO4, can be enhanced by excitation with near-infrared laser pulses. For temperatures lower than Tc = 13 K, we observe a blue-shift of the equilibrium Josephson plasma resonance, detected by terahertz-frequency reflectivity measurements. Key to this measurement is the ability to probe the optical properties at frequencies as low as 150 GHz, detecting the weak interlayer coupling strengths. For T > Tc a similar plasma resonance, absent at equilibrium, is induced up to the spin-ordering temperature TSO = 40 K. These effects are reminiscent but qualitatively different from the light-induced superconductivity observed by resonant phonon excitation in La1.675Eu0.2Sr0.125CuO6.5. Importantly, enhancement of the below-Tc interlayer coupling and its appearance above Tc are preferentially achieved when the near-infrared pump light is polarized perpendicular to the superconducting planes, likely due to more effective melting of stripe order and the less effective excitation of quasiparticles from the Cooper pair condensate when compared to in-plane excitation.

19 pages, 5 figures

References in corpus (9)

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Cited by in corpus (18)

• Theory of Intertwined Orders in High Temperature Superconductors
• Nonlinear light-matter interaction at terahertz frequencies
• Theory of Laser-Controlled Competing Superconducting and Charge Orders
• Charge ordering in superconducting copper oxides
• Nonequilibrium enhancement of high-temperature superconductivity in a 3D model of cuprates
• Femtosecond x rays link melting of charge-density wave correlations and light-enhanced coherent transport in YBa2Cu3O6.6
• Wavelength dependent optical enhancement of superconducting interlayer coupling in La1.885Ba0.115CuO4
• Dynamical order and superconductivity in a frustrated many-body system
• Two distinct kinetic regimes for the relaxation of light-induced superconductivity in La${}_{1.675}$Eu${}_{0.2}$Sr${}_{0.125}$CuO${}_4$
• Photoinduced in-gap excitations in the one-dimensional extended Hubbard model
• Reconciliation of local and long range tilt correlations in underdoped La2-xBaxCuO4
• Restoring Interlayer Josephson Coupling in La_{1.885}Ba_{0.115}CuO_4 by Charge Transfer Melting of Stripe Order
• Transiently enhanced interlayer tunneling in optically driven high $T_c$ superconductors
• Evidence for photoinduced sliding of the charge-order condensate in La${}_{1.875}$Ba${}_{0.125}$CuO${}_4$
• Analytical Solution for the Steady States of the Driven Hubbard model
• Spectral fingerprints of the non-linear dynamics of driven superconductors with dissipation
• Cavity engineering of Hubbard $U$ via phonon polaritons
• Light-induced coherent interlayer transport in stripe-ordered ${\mathrm{La}}_{1.6-x}{\mathrm{Nd}}_{0.4}{\mathrm{Sr}}_x{\mathrm{CuO}}_4$