Impurity effects on photo-induced multiply quantized electronic vortices
ORAL
Abstract
Previous work on massive two-dimensional Dirac materials has shown that exposing such materials to vortex light beams allows for photo-induced multiply quantized vortices and a conserved angular momentum operator [1]. However, this work relies on very specific conditions: circularly polarized light and a pristine sample. Our work investigates how resistant these vortex states are to realistic lab conditions: light with slightly elliptic polarization and dilute impurities. The vortices appear quite robust to impurities of varying strengths, widths, and placements [2]. Both the conserved angular momentum operator and robustness are verified numerically by symmetries presented in both the quasienergy spectra and radial wavefunctions.
*This work was made possible by the U.S. Department of Energy through Award No. DE-SC0025703.
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Publication: [1] Lauren I. Massaro, Connor Meese, Nancy P. Sandler, and Mahmoud M. Asmar. Photoinduced multiply quantized vortex states in dirac-like materials. Phys. Rev. B, 111:085402, Feb 2025.
[2] Eric E. Caldwell, Trevor Walsh, Mahmoud M. Asmar, and Nancy P. Sandler. Photo-induced multiply quantized vortices and realistic lab conditions. in prep, 2025.
Presenters
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Eric Eaton Caldwell
- Ohio University