Photoinduced enhancement of superconductivity in the plaquette Hubbard model

Yuxi Zhang; Rubem Mondaini; Richard T. Scalettar

doi:10.1103/PhysRevB.107.064309

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Photoinduced enhancement of superconductivity in the plaquette Hubbard model

Yuxi Zhang, Rubem Mondaini, Richard T. Scalettar

DOI 10.1103/PhysRevB.107.064309 · Physical Review B

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Abstract

Real-time dynamics techniques have proven increasingly useful in theoretically and experimentally understanding strongly correlated systems. By employing unbiased time-resolved exact diagonalization, we study pump dynamics in the two-dimensional plaquette Hubbard model, where distinct hopping integrals th and th′ are present within and between plaquettes. In the intermediate coupling regime, a significant enhancement of d-wave superconductivity is observed and compared with that obtained by simply examining expectation values with the eigenstates of the Hamiltonian. Our work provides a further understanding of superconductivity in the Hubbard model, extends the description of the pairing amplitude to the frequency-anisotropy plane, and offers a promising approach for experimentally engineering emergent out-of-equilibrium states.