Spin high-harmonic generation through laser-driven phonons
ORAL
Abstract
In the study of open quantum systems, steady states and high-harmonic generation (HHG) far from equilibrium have become foundational aspects of ultrafast science. While most solid-state research has focused on charge HHG, there has been limited exploration of spin degrees of freedom. In this talk, we will theoretically discuss spin HHG in the steady state induced by terahertz laser-driven spin-phonon coupling in two different dissipative spin chains. Instead of using time-dependent magnetic fields to directly drive the spins, we use a magnetophononic mechanism, where the laser first drives the lattice, which in turn excites the spins. We will discuss the impact of different model parameters on optimizing HHG. Notably, we find that driving the system at frequencies well below the spin band produces the highest harmonic orders.
*This work was performed with support from the National Science Foundation (NSF) through Awards No. MPS-2228725 and No. DMR-1945529 (M.Y. and M.K.). Part of this work was performed at the Aspen Center for Physics, which is supported by NSF Grant No. PHY1607611. Funded by the European Union (ERC, QuSimCtrl, 101113633). Views and opinions expressed are however those of the authors only and do not necessarily reflect those of the European Union or the European Research Council Executive Agency. Neither the European Union nor the granting authority can be held responsible for them. The Flatiron Institute is a division of the Simons Foundation. We thank the Initiative for Theoretical Sciences (ITS) for cultivating a productive environment for our research, and we extend our gratitude to the Simons Foundation for supporting ITS at CUNY.
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Publication:PHYSICAL REVIEW B 110, 064420 (2024), arXiv:2408.01567
Presenters
Mohsen Yarmohammadi
Georgetown University
Authors
Negin Moharrami Allafi
The Graduate Center, City University of New York
Marin Bukov
Max Planck Institute for the Physics of Complex Systems
