Analysis of Photo-Induced Chirality and Magnetic Toroidal Moment Based on Floquet Formalism
Abstract
We analyze the condition of photo-induced atomic-scale chirality and magnetic toroidal moment. By performing a high-frequency expansion in the Floquet formalism, we derive an effective static model Hamiltonian from the spinful s-p hybridized model of a single atom interacting with an electromagnetic wave with a particular polarization. The lowest-order and third-order contributions in the high-frequency expansion give rise to the coupling to induce an electric toroidal monopole corresponding to microscopic chirality, while the second-order contribution provides the coupling to induce a magnetic toroidal dipole. We also discuss the condition of the polarization of the electromagnetic wave and induced multipoles. Our results stimulate a new direction of controlling unconventional multipoles by electromagnetic waves.
- Publication:
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Journal of the Physical Society of Japan
- Pub Date:
- April 2024
- DOI:
- 10.7566/JPSJ.93.043702
- arXiv:
- arXiv:2312.07735
- Bibcode:
- 2024JPSJ...93d3702H
- Keywords:
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- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 9 pages, 3 figures, 2 tables