Photoinduced η Pairing in the Hubbard Model.

  title={Photoinduced $\eta$ Pairing in the Hubbard Model.},
  author={Tatsuya Kaneko and Tomonori Shirakawa and Sandro Sorella and Seiji Yunoki},
  journal={Physical review letters},
  volume={122 7},
By employing unbiased numerical methods, we show that pulse irradiation can induce unconventional superconductivity even in the Mott insulator of the Hubbard model. The superconductivity found here in the photoexcited state is due to the η-pairing mechanism, characterized by staggered pair-density-wave oscillations in the off-diagonal long-range correlation, and is absent in the ground-state phase diagram; i.e., it is induced neither by a change of the effective interaction of the Hubbard model… 

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