TY - JOUR
T1 - Control of Spin-Wave Damping in YIG Using Spin Currents from Topological Insulators
AU - Navabi, Aryan
AU - Liu, Yuxiang
AU - Upadhyaya, Pramey
AU - Murata, Koichi
AU - Ebrahimi, Farbod
AU - Yu, Guoqiang
AU - Ma, Bo
AU - Rao, Yiheng
AU - Yazdani, Mohsen
AU - Montazeri, Mohammad
AU - Pan, Lei
AU - Krivorotov, Ilya N.
AU - Barsukov, Igor
AU - Yang, Qinghui
AU - Khalili, Pedram
AU - Tserkovnyak, Yaroslav
AU - Wang, Kang L.
N1 - Funding Information:
A.N. and Y.L. contributed equally to this work. Funding for the project was supported by DARPA M3IC program under contract through The Northrop Grumman Corporation. We would also like to thank Dr. Alexander A. Serga, Timo Noack from University of Kaiserlautern, and Dr. Vasil S. Tiberkevich from Oakland University for their discussion on the three-magnon scattering process and its role in the frequency dependence of the gain.
Publisher Copyright:
© 2019 American Physical Society.
PY - 2019/3/19
Y1 - 2019/3/19
N2 - Spin waves in insulating materials such as Yttrium Iron Garnet (YIG) can be used for signal propagation and processing using the spin of the electrons rather than transport of their charge. Planar YIG films can be integrated with silicon technology to realize devices such as tunable filters, frequency selective limiters, and signal-to-noise enhancers. However, such films suffer from spin-wave damping, which limits their use in such applications. Here, we show that spin currents in topological insulators (TI) can be used to reduce spin-wave damping. TI supports surface spin currents, potentially making it an efficient source of antidamping torque. We show that in a YIG/Bi2Se3 bilayer, the spin-wave damping rate can be reduced by 60% at a current density of 8×105A/cm2. Furthermore, we show that the damping reduction has a strong dependence on spin-wave frequency and we demonstrate that this dependence arises from nonlinear magnon scattering.
AB - Spin waves in insulating materials such as Yttrium Iron Garnet (YIG) can be used for signal propagation and processing using the spin of the electrons rather than transport of their charge. Planar YIG films can be integrated with silicon technology to realize devices such as tunable filters, frequency selective limiters, and signal-to-noise enhancers. However, such films suffer from spin-wave damping, which limits their use in such applications. Here, we show that spin currents in topological insulators (TI) can be used to reduce spin-wave damping. TI supports surface spin currents, potentially making it an efficient source of antidamping torque. We show that in a YIG/Bi2Se3 bilayer, the spin-wave damping rate can be reduced by 60% at a current density of 8×105A/cm2. Furthermore, we show that the damping reduction has a strong dependence on spin-wave frequency and we demonstrate that this dependence arises from nonlinear magnon scattering.
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U2 - 10.1103/PhysRevApplied.11.034046
DO - 10.1103/PhysRevApplied.11.034046
M3 - Article
AN - SCOPUS:85063349510
SN - 2331-7019
VL - 11
JO - Physical Review Applied
JF - Physical Review Applied
IS - 3
M1 - 034046
ER -