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Floquet control of indirect exchange interaction in periodically driven two-dimensional electron systems

Journal Article · · New Journal of Physics
 [1];  [2]
  1. Univ. of Alabama, Tuscaloosa, AL (United States); Kennesaw State Univ., Marietta, GA (United States); University of Alabama
  2. Univ. of Alabama, Tuscaloosa, AL (United States)
We present a theory for the Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction mediated by a two-dimensional (2D) electron system subjected to periodic driving. This is demonstrated for a 2D metal with two ferromagnetic chains deposited in parallel. Our calculations reveal new non-analytic features in the time-averaged spin susceptibility. For weak light–matter coupling, the RKKY interaction shows oscillations with a period tunable by the light amplitude and frequency. For stronger light–matter coupling, the interaction becomes non-oscillatory and remains purely ferromagnetic. Our findings open a path forward for realizing dynamic control of the indirect exchange interaction in 2D magnetic structures.
Research Organization:
Univ. of Alabama, Tuscaloosa, AL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019326
OSTI ID:
1865229
Alternate ID(s):
OSTI ID: 1883241
Journal Information:
New Journal of Physics, Journal Name: New Journal of Physics Journal Issue: 12 Vol. 23; ISSN 1367-2630
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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