Non-equilibrium inhomogeneous DMFT for correlated Heterostructures: Auxiliary Master Approach

Irakli Titvinidze, Antonius Dorda, Wolfgang von der Linden, Enrico Arrigoni

Research output: Contribution to conference(Old data) Lecture or PresentationResearch

Abstract

The recent impressive experimental progress in tailoring different microscopically controlled quantum objects has prompted increasing interest in correlated systems out of equilibrium. Of particular importance are correlated heterostructures, quantum wires and quantum dots with atomic resolution. In this work we present results for the steady state spectral function and current-voltage characteristics for a system consisting of several monoatomic layers of correlated orbitals, attached to two metallic leads. The non-equilibrium situation is driven by a bias-voltage applied to the leads. To investigate the system we generalize a recently introduced dynamical mean-field theory (DMFT) based theoretical scheme [1] for the multilayer case. Specifically, the approach addresses the DMFT impurity problem within an auxiliary system consisting of a correlated impurity, a small number of uncorrelated bath sites and two Markovian environments described by a generalized Master equation [1,2,3].

[1] E. Arrigoni et al., PRL 110, 086403 (2013)

[2] A. Dorda et al., PRB 89, 165105 (2014)

[3] I. Titvinidze et al., arxiv:1508.02953
Original languageEnglish
Publication statusPublished - 10 Mar 2016
EventDPG-Frühjahrstagung 2016 - Regensburg, Regensburg, Germany
Duration: 6 Mar 201611 Mar 2016

Conference

ConferenceDPG-Frühjahrstagung 2016
CountryGermany
CityRegensburg
Period6/03/1611/03/16

Fingerprint

impurities
electric potential
quantum wires
baths
quantum dots
orbitals

Fields of Expertise

  • Advanced Materials Science

Cite this

Non-equilibrium inhomogeneous DMFT for correlated Heterostructures: Auxiliary Master Approach. / Titvinidze, Irakli; Dorda, Antonius; von der Linden, Wolfgang; Arrigoni, Enrico.

2016. DPG-Frühjahrstagung 2016, Regensburg, Germany.

Research output: Contribution to conference(Old data) Lecture or PresentationResearch

Titvinidze, I, Dorda, A, von der Linden, W & Arrigoni, E 2016, 'Non-equilibrium inhomogeneous DMFT for correlated Heterostructures: Auxiliary Master Approach' DPG-Frühjahrstagung 2016, Regensburg, Germany, 6/03/16 - 11/03/16, .
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AU - von der Linden, Wolfgang

AU - Arrigoni, Enrico

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N2 - The recent impressive experimental progress in tailoring different microscopically controlled quantum objects has prompted increasing interest in correlated systems out of equilibrium. Of particular importance are correlated heterostructures, quantum wires and quantum dots with atomic resolution. In this work we present results for the steady state spectral function and current-voltage characteristics for a system consisting of several monoatomic layers of correlated orbitals, attached to two metallic leads. The non-equilibrium situation is driven by a bias-voltage applied to the leads. To investigate the system we generalize a recently introduced dynamical mean-field theory (DMFT) based theoretical scheme [1] for the multilayer case. Specifically, the approach addresses the DMFT impurity problem within an auxiliary system consisting of a correlated impurity, a small number of uncorrelated bath sites and two Markovian environments described by a generalized Master equation [1,2,3].[1] E. Arrigoni et al., PRL 110, 086403 (2013)[2] A. Dorda et al., PRB 89, 165105 (2014)[3] I. Titvinidze et al., arxiv:1508.02953

AB - The recent impressive experimental progress in tailoring different microscopically controlled quantum objects has prompted increasing interest in correlated systems out of equilibrium. Of particular importance are correlated heterostructures, quantum wires and quantum dots with atomic resolution. In this work we present results for the steady state spectral function and current-voltage characteristics for a system consisting of several monoatomic layers of correlated orbitals, attached to two metallic leads. The non-equilibrium situation is driven by a bias-voltage applied to the leads. To investigate the system we generalize a recently introduced dynamical mean-field theory (DMFT) based theoretical scheme [1] for the multilayer case. Specifically, the approach addresses the DMFT impurity problem within an auxiliary system consisting of a correlated impurity, a small number of uncorrelated bath sites and two Markovian environments described by a generalized Master equation [1,2,3].[1] E. Arrigoni et al., PRL 110, 086403 (2013)[2] A. Dorda et al., PRB 89, 165105 (2014)[3] I. Titvinidze et al., arxiv:1508.02953

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