### Abstract

candidates for highly efficient solar cells [1]. Here, photoexcited

doublons and holes act as charge carriers which can proliferate due to

impact ionisation processes [2].

Previous works have investigated the doublon dynamics in such systems

within time-dependent Dynamical Mean-Field Theory (DMFT) by looking at the time evolution after

a photoexcitation [3].

In the present work we focus on the (quasi-) steady state of

periodically driven quantum systems. Specifically, we implement an

algorithm to deal with periodic steady states of strongly correlated

systems, making use of the nonequilibrium Floquet Green's function

formalism within the DMFT approximation.

Our model consists of a correlated layer subject to a periodic driving

via a homogeneous electric field and coupled to leads with different

chemical potentials.

We present results obtained with a Floquet DMFT implementation using the

Auxiliary Master Equation Approach (AMEA) [4] as an impurity solver.

AMEA is based upon mapping the system to an open quantum system

described by a Lindblad Master Equation. This allows the impurity to be

affected by short-ranged non-Markovian dynamics.

For comparison, we also carry out calculations on the same model within iterated perturbation

theory [5]

[1] E. Manousakis, Phys. Rev. B, 82, 125109, (2010); E.Assman et al., Phys. Rev. Lett. 110, 078701 (2013)

[2] J.Coulter et al., Phys. Rev. B, 90,165142 (2014)

[3] M.Eckstein and P. Werner, Phys. Rev. Lett., 113, 076405 (2014); P. Werner et al., Phys. Rev. B 90, 235102 (2014)

[4] E. Arrigoni et al., Phys. Rrev. Lett., 110, 086403 (2013); I. Titvinidze et al., Phys. Rev. B, 92, 245125 (2015)

[5] A. Joura et al., Phys Rrev. B, 91, 245153 (2015)

Originalsprache | englisch |
---|---|

Publikationsstatus | Veröffentlicht - 5 Sep 2016 |

Veranstaltung | Quantum Dynamics: From Algorithms to Applications - Greifswald, Deutschland Dauer: 5 Sep 2016 → 8 Sep 2016 http://theorie2.physik.uni-greifswald.de/qdyn16/ |

### Workshop

Workshop | Quantum Dynamics: From Algorithms to Applications |
---|---|

Land | Deutschland |

Ort | Greifswald |

Zeitraum | 5/09/16 → 8/09/16 |

Internetadresse |

### Fingerprint

### Fields of Expertise

- Advanced Materials Science

### Dies zitieren

*Towards "Mott Solar Cells"*. Postersitzung präsentiert bei Quantum Dynamics: From Algorithms to Applications, Greifswald, Deutschland.

**Towards "Mott Solar Cells".** / Sorantin, Max Erich; Arrigoni, Enrico; von der Linden, Wolfgang; Dorda, Antonius.

Publikation: Konferenzbeitrag › Poster › Forschung

}

TY - CONF

T1 - Towards "Mott Solar Cells"

AU - Sorantin, Max Erich

AU - Arrigoni, Enrico

AU - von der Linden, Wolfgang

AU - Dorda, Antonius

PY - 2016/9/5

Y1 - 2016/9/5

N2 - Recently, Mott-insulating heterostructures have been proposed ascandidates for highly efficient solar cells [1]. Here, photoexciteddoublons and holes act as charge carriers which can proliferate due toimpact ionisation processes [2]. Previous works have investigated the doublon dynamics in such systemswithin time-dependent Dynamical Mean-Field Theory (DMFT) by looking at the time evolution aftera photoexcitation [3].In the present work we focus on the (quasi-) steady state ofperiodically driven quantum systems. Specifically, we implement analgorithm to deal with periodic steady states of strongly correlatedsystems, making use of the nonequilibrium Floquet Green's functionformalism within the DMFT approximation.Our model consists of a correlated layer subject to a periodic drivingvia a homogeneous electric field and coupled to leads with differentchemical potentials.We present results obtained with a Floquet DMFT implementation using theAuxiliary Master Equation Approach (AMEA) [4] as an impurity solver.AMEA is based upon mapping the system to an open quantum systemdescribed by a Lindblad Master Equation. This allows the impurity to beaffected by short-ranged non-Markovian dynamics.For comparison, we also carry out calculations on the same model within iterated perturbationtheory [5][1] E. Manousakis, Phys. Rev. B, 82, 125109, (2010); E.Assman et al., Phys. Rev. Lett. 110, 078701 (2013)[2] J.Coulter et al., Phys. Rev. B, 90,165142 (2014)[3] M.Eckstein and P. Werner, Phys. Rev. Lett., 113, 076405 (2014); P. Werner et al., Phys. Rev. B 90, 235102 (2014)[4] E. Arrigoni et al., Phys. Rrev. Lett., 110, 086403 (2013); I. Titvinidze et al., Phys. Rev. B, 92, 245125 (2015)[5] A. Joura et al., Phys Rrev. B, 91, 245153 (2015)

AB - Recently, Mott-insulating heterostructures have been proposed ascandidates for highly efficient solar cells [1]. Here, photoexciteddoublons and holes act as charge carriers which can proliferate due toimpact ionisation processes [2]. Previous works have investigated the doublon dynamics in such systemswithin time-dependent Dynamical Mean-Field Theory (DMFT) by looking at the time evolution aftera photoexcitation [3].In the present work we focus on the (quasi-) steady state ofperiodically driven quantum systems. Specifically, we implement analgorithm to deal with periodic steady states of strongly correlatedsystems, making use of the nonequilibrium Floquet Green's functionformalism within the DMFT approximation.Our model consists of a correlated layer subject to a periodic drivingvia a homogeneous electric field and coupled to leads with differentchemical potentials.We present results obtained with a Floquet DMFT implementation using theAuxiliary Master Equation Approach (AMEA) [4] as an impurity solver.AMEA is based upon mapping the system to an open quantum systemdescribed by a Lindblad Master Equation. This allows the impurity to beaffected by short-ranged non-Markovian dynamics.For comparison, we also carry out calculations on the same model within iterated perturbationtheory [5][1] E. Manousakis, Phys. Rev. B, 82, 125109, (2010); E.Assman et al., Phys. Rev. Lett. 110, 078701 (2013)[2] J.Coulter et al., Phys. Rev. B, 90,165142 (2014)[3] M.Eckstein and P. Werner, Phys. Rev. Lett., 113, 076405 (2014); P. Werner et al., Phys. Rev. B 90, 235102 (2014)[4] E. Arrigoni et al., Phys. Rrev. Lett., 110, 086403 (2013); I. Titvinidze et al., Phys. Rev. B, 92, 245125 (2015)[5] A. Joura et al., Phys Rrev. B, 91, 245153 (2015)

M3 - Poster

ER -