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

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Hubbard model
Exchange interactions
Superconductivity
superconductivity
Modulation
modulation
Electrons
augmentation
electronics
electrons
interactions
Temperature
temperature

Keywords

  • cond-mat.quant-gas

Cite this

Enhancement of super-exchange pairing in the periodically-driven Hubbard model. / Coulthard, J.; Clark, S. R.; Al-Assam, S.; Cavalleri, A.; Jaksch, D.

In: Physical Review B : Condensed Matter and Materials Physics, Vol. 96, 085104, 15.08.2017.

Research output: Contribution to journalArticle

Coulthard, J. ; Clark, S. R. ; Al-Assam, S. ; Cavalleri, A. ; Jaksch, D. / Enhancement of super-exchange pairing in the periodically-driven Hubbard model. In: Physical Review B : Condensed Matter and Materials Physics. 2017 ; Vol. 96.
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