Fig. 3: Resonance frequency and transition temperature tuning with a gate voltage.
From: Magnetic and electronic phase transitions probed by nanomechanical resonators
a Resonance frequency as a function of gate voltage at 50 K. Inset: schematics of the electrostatic tuning principle. b Resonance frequency as a function of temperature for six different voltages. Inset: optical image of the sample, t = 8 ± 0.5 nm. Scale bar: 16 μm. c Derivative of \({f}_{0}^{2}\) as a function of gate voltage and temperature. Blue arrow, line colors and legend indicate the values of \({V}_{{\rm{G}}}^{{\rm{DC}}}\). Dashed gray lines indicate the decrease in transition temperature \(\Delta {T}_{{\rm{N}}}={T}_{{\rm{N}}}^{* }({V}_{{\rm{G}}}^{{\rm{DC}}})-{T}_{{\rm{N}}}(0\, {\mathrm{V}})\) with increasing \({V}_{{\rm{G}}}^{{\rm{DC}}}\). d Blue solid dots—shift in TN as a function of \({V}_{{\rm{G}}}^{{\rm{DC}}}\) extracted from the peak position in (c). Vertical blue bars—error bar in ΔTN estimated from determining the peak position in (c) within 2% accuracy in the measured maximum. Orange solid line—model of electrostatically induced strain Δϵ as a function of \({V}_{{\rm{G}}}^{{\rm{DC}}}\) (see Supplementary Note 5).
