Towards Mott insulator bases solar cells: Floquet Dynamical Mean-Field Theory approach for a bias-driven correlated layer in a time-periodic electric field

Research output: Contribution to conferencePosterResearch

Abstract

Recently, Mott-insulating heterostructures have been proposed as
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)
Original languageEnglish
Publication statusPublished - 22 Sep 2016
EventViCoM Young Researchers Meeting 2016 - Erwin Schrödinger Institute, Vienna, Austria
Duration: 22 Sep 201623 Sep 2016
https://www.sfb-vicom.at/events/young-researchers-meeting-2016/program/

Conference

ConferenceViCoM Young Researchers Meeting 2016
CountryAustria
CityVienna
Period22/09/1623/09/16
Internet address

Fingerprint

solar cells
insulators
electric fields
impurities
quasi-steady states
photoexcitation
charge carriers
ionization
approximation

Fields of Expertise

  • Advanced Materials Science

Cite this

Towards Mott insulator bases solar cells : Floquet Dynamical Mean-Field Theory approach for a bias-driven correlated layer in a time-periodic electric field. / Sorantin, Max Erich; Held, Karsten; Dorda, Antonius; von der Linden, Wolfgang; Arrigoni, Enrico.

2016. Poster session presented at ViCoM Young Researchers Meeting 2016, Vienna, Austria.

Research output: Contribution to conferencePosterResearch

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abstract = "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 to impact ionisation processes [2]. Previous works have investigated the doublon dynamics in such systems withintime-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 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)",
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T2 - Floquet Dynamical Mean-Field Theory approach for a bias-driven correlated layer in a time-periodic electric field

AU - Sorantin, Max Erich

AU - Held, Karsten

AU - Dorda, Antonius

AU - von der Linden, Wolfgang

AU - Arrigoni, Enrico

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M3 - Poster

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