Enhancement of super-exchange pairing in the periodically-driven Hubbard model

J. Coulthard, S. R. Clark, S. Al-Assam, A. Cavalleri, D. Jaksch

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Abstract

We show that periodic driving can enhance electron pairing in strongly-correlated systems. Focusing on the strong-coupling limit of the doped Hubbard model we investigate in-gap, spatially inhomogeneous, on-site modulations and demonstrate that they substantially reduce electronic hopping without suppressing super-exchange interactions and pair hopping. We calculate real-time dynamics for the one-dimensional case, starting from zero and finite temperature initial states, and show that enhanced singlet-pair correlations emerge quickly and robustly in the out-of-equilibrium many-body state. Our results reveal a fundamental pairing mechanism that might underpin optically induced superconductivity in some strongly correlated quantum materials.
Original languageEnglish
Article number085104
Number of pages12
JournalPhysical Review B : Condensed Matter and Materials Physics
Volume96
Early online date1 Aug 2017
DOIs
Publication statusPublished - 15 Aug 2017

Keywords

  • cond-mat.quant-gas

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