Delayed Antiferromagnetic Spin Hall Oscillator as Random THz Signal Source

Authors D.V. Slobodianiuk1,2
Affiliations

1Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska st., 01601 Kyiv, Ukraine

2Institute of Magnetism, 36-b Akad. Vernadskogo blvd., 03142 Kyiv, Ukraine

Е-mail denslobod@ukr.net
Issue Volume 15, Year 2023, Number 6
Dates Received 07 September 2023; revised manuscript received 15 December 2023; published online 27 December 2023
Citation D.V. Slobodianiuk, J. Nano- Electron. Phys. 15 No 6, 06026 (2023)
DOI https://doi.org/10.21272/jnep.15(6).06026
PACS Number(s) 75.50.Ee, 05.40. – a
Keywords Antiferromagnet (2) , Oscillator (3) , Randomness.
Annotation

Antiferromagnetic spin Hall oscillator with delay under action of DC signal is studied numerically. The delay in oscillator can be attributed to internal inertia of the antiferromagnetic lattice, or could be introduced artificially by electrical means. We have shown that as result of this delay system output becomes random. Such behavior arises from nonlinearity of the system, and somewhat resembles Ikeda equation dynamics. We have also calculated Poincare section of the system, to further confirm stochastic nature of the system output. Results show that phase trajectories of the system are scattered all over the phase plane, as simulation time increases. Also we have calculated Fourier transform of the output signal. Obtained spectrum also shows system output random nature. Obtained results are important for further development of antiferromagnetic terahertz-frequency spintronic oscillators and their applications as random signal sources. Such high frequency random signal sources can revolutionize cryptography and probabilistic computing.

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