Microscopic theory for the light-induced anomalous Hall effect in graphene
By S. A. Sato, J. McIver, M. Nuske, P. Tang, G. Jotzu, B. Schulte, H. Hubener, Umberto De Giovannini, L. Mathey, Michael A Sentef and 2 more. Physical review B, 2019
139 citations recorded by the source corpus.
We employ a quantum Liouville equation with relaxation to model the recently observed anomalous Hall effect in graphene irradiated by an ultrafast pulse of circularly polarized light. In the weak-field regime, we demonstrate that the Hall effect originates from an asymmetric population of photocarriers in the Dirac bands. By contrast, in the strong-field regime, the system is driven into a nonequilibrium steady state that is well described by topologically nontrivial Floquet-Bloch bands. Here, the anomalous Hall current originates from the combination of a population imbalance in these dressed bands together with a smaller anomalous velocity contribution arising from their Berry curvature. This robust and general finding enables the simulation of electrical transport from light-induced Floquet-Bloch bands in an experimentally relevant parameter regime and creates a pathway to designing ultrafast quantum devices with Floquet-engineered transport properties.
Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/4c956d64db93bdc6ffb9264c6257c192b5b7ca78
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In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Light-induced anomalous Hall effect in graphene (2018, unknown): “At the highest achievable fluence, we estimate G xy = (1.8 ± 0.4) e 2 /h, consistent with recent numerical simulations of optically-driven graphene for our laser pulse parameters 27 .”
- Colloquium: Nonthermal pathways to ultrafast control in quantum materials (2021, background): “Far stronger optical fields are thereby required to overcome these sources of decoherence in driven solid-state electronic systems (Sato et al., 2019; Nuske et al., 2020; Aeschlimann et al., 2021), which has historically made dressed states difficult to experimentally access.”