Revealing Hund’s multiplets in Mott insulators under strong electric fields
- Dasari, Nagamalleswararao Department of Physics, University of Erlangen-Nuremberg, 91058 Erlangen, Germany
- Li, Jiajun Department of Physics, University of Erlangen-Nuremberg, 91058 Erlangen, Germany
- Werner, Philipp Department of Physics, University of Fribourg, 1700 Fribourg, Switzerland
- Eckstein, Martin Department of Physics, University of Erlangen-Nuremberg, 91058 Erlangen, Germany
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10.04.2020
Published in:
- Physical Review B. - 2020, vol. 101, no. 16, p. 161107
English
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.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 328504
- DOI 10.1103/PhysRevB.101.161107
- Persistent URL
- https://folia.unifr.ch/unifr/documents/308647
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