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Orbital Floquet Engineering of Exchange Interactions in Magnetic Materials

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.

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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.

Item Type:Article
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URLURL TypeDescription Paper
Hsieh, David0000-0002-0812-955X
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
Funding AgencyGrant Number
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Army Research Office (ARO)W911NF-16-1-0361
Issue or Number:22
Record Number:CaltechAUTHORS:20190520-132243974
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95602
Deposited By: Tony Diaz
Deposited On:20 May 2019 20:33
Last Modified:16 Nov 2021 17:13

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