# Photoinduced η Pairing in the Hubbard Model.

@article{Kaneko2019PhotoinducedP, title={Photoinduced $\eta$ Pairing in the Hubbard Model.}, author={Tatsuya Kaneko and Tomonori Shirakawa and Sandro Sorella and Seiji Yunoki}, journal={Physical review letters}, year={2019}, volume={122 7}, pages={ 077002 } }

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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## References

SHOWING 1-10 OF 75 REFERENCES

η -pairing superfluid in periodically-driven fermionic Hubbard model with strong attraction

- Physics
- 2016

We propose a novel possibility of dynamically changing the pairing of superconductors from $s$ wave to $\eta$ pairing (where the pairs condense at the Brillouin-zone corner momenta) by driving the…

Producing coherent excitations in pumped Mott antiferromagnetic insulators

- Physics
- 2017

Nonequilibrium dynamics in correlated materials has attracted attention due to the possibility of characterizing, tuning, and creating complex ordered states. To understand the photoinduced…

Photoinduced correlated electron dynamics in a two-leg ladder Hubbard system

- Physics
- 2016

Photoinduced carrier dynamics in a correlated electron system on a coupled two-leg ladder lattice are studied. The two-leg ladder Hubbard model is analyzed by utilizing the exact diagonalization…

A cold-atom Fermi–Hubbard antiferromagnet

- PhysicsNature
- 2017

The results demonstrate that microscopy of cold atoms in optical lattices can help to understand the low-temperature Fermi–Hubbard model and provide a valuable benchmark for numerical simulations.

Photoinduced Tomonaga-Luttinger-like liquid in a Mott insulator

- Physics
- 2008

Photoinduced metallic states in a Mott insulator are studied for the half-filled one-dimensional Hubbard model with the time-dependent density-matrix renormalization group. An irradiation of strong…

Photoinduced insulator-metal transition in one-dimensional Mott insulators

- Physics
- 2008

We theoretically investigate the dynamics of insulator-metal transition induced by light-pulse excitation in one-dimensional Mott insulators. We adopt the Pariser--Parr--Pople model and the…

Thermalization of a pump-excited Mott insulator

- Physics
- 2011

We use nonequilibrium dynamical mean-field theory in combination with a recently implemented strong-coupling impurity solver to investigate the relaxation of a Mott insulator after a laser excitation…

Quantum dynamics of the Hubbard-Holstein model in equilibrium and nonequilibrium: application to pump-probe phenomena.

- PhysicsPhysical review letters
- 2012

A criterion for observing oscillations in high T(c) compounds: the time span of the pump light pulse τ(pump) has to be shorter than the phonon oscillation period T(ph), similar to the relaxation time of the charge system.

Theory of light-enhanced phonon-mediated superconductivity

- Physics
- 2016

We investigate the dynamics of a phonon-mediated superconductor driven out of equilibrium. The electronic hopping amplitude is ramped down in time, resulting in an increased electronic density of…

Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach

- Physics
- 2016

In the last two decades non-equilibrium spectroscopies have evolved from avant-garde studies to crucial tools for expanding our understanding of the physics of strongly correlated materials. The…