Revealing Hund's multiplets in Mott insulators under strong electric fields

Dasari NR, Li J, Werner P, Eckstein M (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Physical Review B American Physical Society

Book Volume: 101

Journal Issue: 16

DOI: 10.1103/PhysRevB.101.161107

Abstract

We investigate the strong-field dynamics of a paramagnetic two-band Mott insulator using real-time dynamical mean-field theory. We demonstrate that strong electric fields can lead to a transient localization of electrons. This nonequilibrium quantum effect allows us to reveal specific signatures of local correlations in the time-resolved photoemission spectrum. In particular, we demonstrate that the localization can be strong enough to produce atomiclike spin multiplets determined by the Hund's coupling J, and thus provide a way of measuring J inside the solid. Our simulation also fully incorporates nonlinear field-induced tunneling processes, which would lead to a dielectric breakdown in the steady state limit. A careful analysis of these processes, however, shows that they remain weak enough and do not prevent the measurement of the transiently localized spectra.

Authors with CRIS profile

Nagamalleswara Rao Dasari Lehrstuhl für Theoretische Festkörperphysik Jiajun Li Lehrstuhl für Theoretische Festkörperphysik Martin Eckstein Lehrstuhl für Theoretische Festkörperphysik

Involved external institutions

University of Fribourg / Universitè de Fribourg

Switzerland (CH)

How to cite

APA:

Dasari, N.R., Li, J., Werner, P., & Eckstein, M. (2020). Revealing Hund's multiplets in Mott insulators under strong electric fields. Physical Review B, 101(16). https://doi.org/10.1103/PhysRevB.101.161107

MLA:

Dasari, Nagamalleswara Rao, et al. "Revealing Hund's multiplets in Mott insulators under strong electric fields." Physical Review B 101.16 (2020).

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