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Title: Electrically tunable terahertz resonance in antiferromagnetic NiO/Pt heterostructures
Authors: Yang, Dongsheng
Wen, Wen
Xu, Chang
Lee, Kyusup
Yu, Ting
Yang, Hyunsoo
Keywords: Science::Physics
Issue Date: 2023
Source: Yang, D., Wen, W., Xu, C., Lee, K., Yu, T. & Yang, H. (2023). Electrically tunable terahertz resonance in antiferromagnetic NiO/Pt heterostructures. Physical Review Applied, 20(1), 014023-1-014023-7.
Journal: Physical Review Applied 
Abstract: Antiferromagnets that facilitate terahertz (THz) spin resonances have the potential to revolutionize high-speed electronics at the nanoscale. The electrical control of THz spin resonances is the key to such THz devices; however, experimental demonstration has remained elusive. In this work, we demonstrate electrically tunable THz spin resonance in an antiferromagnetic NiO/Pt heterostructure by employing both low-wavenumber Raman and continuous-wave THz spectroscopy techniques. A redshift of over 100 GHz in the NiO spin resonance frequency of around 1 THz is observed by applying charge currents along the adjacent Pt layer. A control experiment with NiO/Cu and temperature-dependent measurement confirm that the dominant tuning mechanism is Joule heating. Finally, a prototype device is designed to achieve an electrical control of THz transmission at dual channels of 0.96 and 1 THz, leading to a Q factor of 56. This work opens up the possibility for the implementation of tunable THz devices utilizing antiferromagnetic spin resonance.
ISSN: 2331-7019
DOI: 10.1103/PhysRevApplied.20.014023
Schools: School of Physical and Mathematical Sciences 
Rights: © 2023 American Physical Society. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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