Chaudhary, Swati and Hsieh, David and Refael, Gil (2019) Orbital Floquet Engineering of Exchange Interactions in Magnetic Materials. Physical Review B, 100 (22). Art. No. 220403. ISSN 2469-9950. doi:10.1103/PhysRevB.100.220403. https://resolver.caltech.edu/CaltechAUTHORS:20190520-132243974
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Abstract
We present a scheme to control the spin-exchange interactions by manipulating the orbital degrees of freedom using a periodic drive. We discuss two different protocols for orbital Floquet engineering. In one case, a periodic drive modifies the properties of the ligand orbitals which mediate magnetic interactions between transition-metal ions. In the other case, we consider drive-induced mixing of d orbitals on each magnetic ion. We first find that an AC Stark shift of orbitals induces a change comparable to that induced from photoinduced hopping schemes, but expands the applicable frequency ranges. Next, we find that radiatively induced coherent vibrations provide a realistic path for Floquet orbital engineering with short pulses of electric fields weaker than 0.5 V/Å producing 5%–10% changes in the magnetic coupling of Mott insulators such as the rare-earth titanates.
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| Additional Information: | © 2019 American Physical Society. Received 3 June 2019; published 9 December 2019. We acknowledge support from the IQIM, an NSF physics frontier center funded by the Gordon and Betty Moore Foundation. We are grateful for support from ARO MURI W911NF-16-1-0361 “Quantum Materials by Design with Electromagnetic Excitation” sponsored by the US Army. | |||||||||
| Group: | Institute for Quantum Information and Matter | |||||||||
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| Issue or Number: | 22 | |||||||||
| DOI: | 10.1103/PhysRevB.100.220403 | |||||||||
| Record Number: | CaltechAUTHORS:20190520-132243974 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20190520-132243974 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 95602 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 20 May 2019 20:33 | |||||||||
| Last Modified: | 16 Nov 2021 17:13 |
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