Voltage Control of Magnetism in THz Regime via Magnon-Phonon Coupling
Abstract
The major aim of this work is to open a new pathway towards THz devices by demonstrating THz magnon-phonon coupling for the first time. To accomplish this, we have targeted antiferromagnets as a material class of interest because their resonance frequencies are much higher than ferromagnets and are often in the THz range. This fact indicates the existence of desirable THz magnon modes, but the level of phonon coupling with these modes is so far unknown. To address this question, our work under this contract seeks to investigate the fundamental physics of antiferromagnets in two main areas: 1) check whether magneto-mechanical coupling at THz is present, since definitive proof is generally lacking, and 2) to prove that strain can be used as a method to control antiferromagnetic states, since this would enable creation or control of THz frequency magnon/phonon excitation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 22, 2021
- Accession Number
- AD1205975
Entities
People
- Gregory P. Carman
Organizations
- University of California, Los Angeles