Coherent cellular dynamical mean-field theory: a real-space quantum embedding approach to disorder in strongly correlated electron systems

Tscheppe P, Klett M, Menke H, Andergassen S, Enderlein N, Hansmann P, Schäfer T (2025)

Publication Type: Journal article

Publication year: 2025

Journal

New Journal of Physics Institute of Physics: Open Access Journals / Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft

Book Volume: 27

Article Number: 123504

Journal Issue: 12

DOI: 10.1088/1367-2630/ae26c0

Abstract

We formulate a quantum embedding algorithm in real-space for the simultaneous theoretical treatment of nonlocal electronic correlations and disorder, the coherent cellular dynamical mean-field theory (C-CDMFT). This algorithm combines the molecular coherent potential approximation (CPA) with the cellular dynamical mean-field theory. After a pedagogical review of quantum embedding theories for disordered and interacting electron systems, and a detailed discussion of its work flow, we present first results from C-CDMFT for the half-filled two-dimensional Anderson-Hubbard model on a square lattice: (i) the analysis of its Mott metal-insulator transition as a function of disorder strength, and (ii) the impact of different types of disorder on its magnetic phase diagram. For the latter, by means of a ‘disorder diagnostics’, we are able to precisely identify the contributions of different disorder configurations to the system’s magnetic response.

Authors with CRIS profile

Niklas Enderlein Professur für Theoretische Physik mit dem Schwerpunkt Molekulare Materialien Philipp Hansmann Professur für Theoretische Physik mit dem Schwerpunkt Molekulare Materialien

Involved external institutions

Technische Universität Wien / Vienna University of Technology AT Austria (AT) Max-Planck-Institut für Festkörperforschung DE Germany (DE)

How to cite

APA:

Tscheppe, P., Klett, M., Menke, H., Andergassen, S., Enderlein, N., Hansmann, P., & Schäfer, T. (2025). Coherent cellular dynamical mean-field theory: a real-space quantum embedding approach to disorder in strongly correlated electron systems. New Journal of Physics, 27(12). https://doi.org/10.1088/1367-2630/ae26c0

MLA:

Tscheppe, Patrick, et al. "Coherent cellular dynamical mean-field theory: a real-space quantum embedding approach to disorder in strongly correlated electron systems." New Journal of Physics 27.12 (2025).

BibTeX: Download