Michael Meixner

On Degeneracies of Density, Magnetic, and Pairing Responses: How Competing Orders Echo Underlying Symmetries in the Hubbard Model

Michael Meixner, Herbert Eßl, Matthias Reitner, A. Toschi et autres

Strongly correlated electron systems often display competing or even intertwined ordering tendencies, hinting to extremely close or degenerate many-electron energies. While degeneracies are directly rooted in the underlying symmetries of the problem under investigation, their multifaceted effects on different response functions and …

On Degeneracies of Density, Magnetic, and Pairing Responses: How Competing Orders Echo Underlying Symmetries in the Hubbard Model

Michael Meixner, Herbert Eßl, Matthias Reitner, A. Toschi et autres

Strongly correlated electron systems often display competing or even intertwined ordering tendencies, hinting to extremely close or degenerate many-electron energies. While degeneracies are directly rooted in the underlying symmetries of the problem under investigation, their multifaceted effects on different response functions and …

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Data: Non-perturbative effects of short-range spatial correlations at the two-particle level

Michael Meixner, Matthias Reitner, Thomas Schäfer, A. Toschi

With this data set we provide representative and relevant data for the analyses provided in https://arxiv.org/pdf/2512.17716 via HDF5 files, namely at half-filling the values T=1/15t, U=4,5.5,5.9,5.92t, where the latter is the closest data to the MIT Uc_2 available. The file names contain …

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Non-perturbative effects of short-range spatial correlations at the two-particle level

Michael Meixner, Matthias Reitner, Thomas Schäfer, A. Toschi

By means of cellular dynamical mean-field theory (CDMFT) we study how short-range correlations drive the breakdown of the self-consistent perturbation theory in two-dimensional systems and the most relevant physical consequences associated to it. To this aim, we first derive in a structured …

Disentangling real space fluctuations: the diagnostics of metal-insulator transitions beyond single-particle spectral functions

Michael Meixner, Nils Wentzell, Pietro M. Bonetti, Sabine Andergassen et autres

The destruction of metallicity due to the mutual Coulomb interaction of quasiparticles gives rise to fascinating phenomena of solid state physics such as the Mott metal-insulator transition and the pseudogap. A key observable characterizing their occurrences is the single-particle spectral function, determined …

Subcell‐Resolved Electroluminescence Imaging of Monolithic Perovskite/Silicon Tandem Solar Cell for High‐Throughput Characterization

Ivanol Jaurece Djeukeu, Jonas Horn, Michael Meixner, Enno Wagner et autres

In the midterm future, the photovoltaic industry is expected to be dominated by two‐terminal (2T) perovskite–silicon (pero–Si) tandem solar cells, which have high energy conversion efficiency and require characterization for large‐scale production. Electroluminescence (EL) imaging is one of the most prevalent and …

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Mott transition and pseudogap of the square-lattice Hubbard model: Results from center-focused cellular dynamical mean-field theory

Michael Meixner, Henri Menke, Marcel Klett, Sarah Heinzelmann et autres

The recently proposed center-focused post-processing procedure [Phys. Rev. Res. 2, 033476 (2020)] of cellular dynamical mean-field theory suggests that central sites of large impurity clusters are closer to the exact solution of the Hubbard model than the edge sites. In this paper, …

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Report on 2310.17302v1

Michael Meixner, Henri Menke, Marcel Klett, Sarah Heinzelmann et autres

The recently proposed center-focused post-processing procedure [Phys.Rev. Research 2, 033476 (2020)] of cellular dynamical mean-field theory suggests that central sites of large impurity clusters are closer to the exact solution of the Hubbard model than the edge sites.In this paper, we systematically …

de, at (code pays fourni par la source)

Report on 2310.17302v1

Michael Meixner, Henri Menke, Marcel Klett, Sarah Heinzelmann et autres

The recently proposed center-focused post-processing procedure [Phys.Rev. Research 2, 033476 (2020)] of cellular dynamical mean-field theory suggests that central sites of large impurity clusters are closer to the exact solution of the Hubbard model than the edge sites.In this paper, we systematically …

de, in, at, cn (code pays fourni par la source)

Report on 2310.17302v1

Michael Meixner, Henri Menke, Marcel Klett, Sarah Heinzelmann et autres

The recently proposed center-focused post-processing procedure [Phys.Rev. Research 2, 033476 (2020)] of cellular dynamical mean-field theory suggests that central sites of large impurity clusters are closer to the exact solution of the Hubbard model than the edge sites.In this paper, we systematically …

de, in, cn, at (code pays fourni par la source)

Mott transition and pseudogap of the square-lattice Hubbard model: results from center-focused cellular dynamical mean-field theory

Michael Meixner, Henri Menke, Marcel Klett, Sarah Heinzelmann et autres

The recently proposed center-focused post-processing procedure [Phys. Rev. Research 2, 033476 (2020)] of cellular dynamical mean-field theory suggests that central sites of large impurity clusters are closer to the exact solution of the Hubbard model than the edge sites. In this paper, …

de, at (code pays fourni par la source)

Determination of base doping concentration of silicon solar cells from light IV-curves

K. Ramspeck, Lothar Komp, Stefan Dauwe, Karsten Bothe et autres

In this contribution we present a novel method to determine the base doping concentration of solar cells from current-voltage (IV) curves measured under illumination. Our method is based on counting the charge carriers which are stored during an IV-sweep inside the Si …

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