Abstract
We investigate the magnetization dynamics of a pair of ferromagnetic insulators (FMIs) deposited on the surface of a topological insulator (TI). Because of the nonlinear nature of the underlying physics and intrinsic dynamics, the FMIs can exhibit oscillatory behaviors even under a constant applied voltage. The motion of the surface electrons of the TI, which obeys relativistic quantum mechanics, provides a mechanism of direct coupling between the FMIs. In particular, the spin-polarized current of the TI surface electrons can affect the magnetization of the two FMIs, which in turn modulates the electron transport, giving rise to a hybrid relativistic quantum and classical nonlinear dynamical system. We find robust phase and antiphase locking between the magnetization dynamics. As driving the surface electrons of a TI requires only extremely low power, our finding suggests that nanoscale FMIs coupled by a spin-polarized current on the surface of a TI have the potential to serve as the fundamental building blocks of unconventional, low-power computing paradigms.
| Original language | English (US) |
|---|---|
| Article number | 064003 |
| Journal | Physical Review Applied |
| Volume | 10 |
| Issue number | 6 |
| DOIs | |
| State | Published - Dec 3 2018 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Phase Locking of a Pair of Ferromagnetic Nano-oscillators on a Topological Insulator. / Wang, Cheng Zhen; Xu, Hong Ya; Rizzo, Nicholas D.; Kiehl, Richard; Lai, Ying-Cheng.
In: Physical Review Applied, Vol. 10, No. 6, 064003, 03.12.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Phase Locking of a Pair of Ferromagnetic Nano-oscillators on a Topological Insulator
AU - Wang, Cheng Zhen
AU - Xu, Hong Ya
AU - Rizzo, Nicholas D.
AU - Kiehl, Richard
AU - Lai, Ying-Cheng
PY - 2018/12/3
Y1 - 2018/12/3
N2 - We investigate the magnetization dynamics of a pair of ferromagnetic insulators (FMIs) deposited on the surface of a topological insulator (TI). Because of the nonlinear nature of the underlying physics and intrinsic dynamics, the FMIs can exhibit oscillatory behaviors even under a constant applied voltage. The motion of the surface electrons of the TI, which obeys relativistic quantum mechanics, provides a mechanism of direct coupling between the FMIs. In particular, the spin-polarized current of the TI surface electrons can affect the magnetization of the two FMIs, which in turn modulates the electron transport, giving rise to a hybrid relativistic quantum and classical nonlinear dynamical system. We find robust phase and antiphase locking between the magnetization dynamics. As driving the surface electrons of a TI requires only extremely low power, our finding suggests that nanoscale FMIs coupled by a spin-polarized current on the surface of a TI have the potential to serve as the fundamental building blocks of unconventional, low-power computing paradigms.
AB - We investigate the magnetization dynamics of a pair of ferromagnetic insulators (FMIs) deposited on the surface of a topological insulator (TI). Because of the nonlinear nature of the underlying physics and intrinsic dynamics, the FMIs can exhibit oscillatory behaviors even under a constant applied voltage. The motion of the surface electrons of the TI, which obeys relativistic quantum mechanics, provides a mechanism of direct coupling between the FMIs. In particular, the spin-polarized current of the TI surface electrons can affect the magnetization of the two FMIs, which in turn modulates the electron transport, giving rise to a hybrid relativistic quantum and classical nonlinear dynamical system. We find robust phase and antiphase locking between the magnetization dynamics. As driving the surface electrons of a TI requires only extremely low power, our finding suggests that nanoscale FMIs coupled by a spin-polarized current on the surface of a TI have the potential to serve as the fundamental building blocks of unconventional, low-power computing paradigms.
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U2 - 10.1103/PhysRevApplied.10.064003
DO - 10.1103/PhysRevApplied.10.064003
M3 - Article
VL - 10
JO - Physical Review Applied
JF - Physical Review Applied
SN - 2331-7019
IS - 6
M1 - 064003
ER -