Fig. 2: Voltage-controlled threshold current and auto-oscillation frequency.
From: Giant voltage-controlled modulation of spin Hall nano-oscillator damping
PSDs of the spin-wave auto-oscillations vs. current showing a systematic change both in threshold current (Ith) and in frequency under the application of different gate voltages aVG = −2 V, bVG = 0 V, and cVG = +2 V. d Variation of Ith with gate voltage exhibiting a linear dependence. Inset: Illustration of threshold current extraction via a linear fit of 1/P vs. Idc (employing the method as in ref. 34). e Comparison of auto-oscillation frequency tunability with drive current at different gate voltages. f Dependence of auto-oscillating frequency shift, Δf(VG) = f(VG) − f(VG = 0), on gate voltage at a drive current Idc = 1.2 mA well above threshold.
