Fig. 2: SHG and ferroelectric characterizations of CuVP2S6. | Nature Communications

Fig. 2: SHG and ferroelectric characterizations of CuVP2S6.

From: Intrinsic ferroelectric CuVP2S6 for potential applications in neuromorphic recognition and translation

Fig. 2

a SHG spectra of CuVP2S6 as a function of excitation power, with the incident laser wavelength of 1064 nm. b Power-law relationship between SHG intensity and excitation power, yielding a fitting coefficient of 1.95. c Thickness-dependent SHG intensity of CuVP2S6 nanoflakes. d, e Angle-resolved polarized SHG spectra in parallel (d) and perpendicular (e) configurations, featuring experimental data (dots) and corresponding fitted curves. f Temperature-dependent SHG intensity of CuVP2S6 nanoflakes, indicating the Curie temperature of 650 K. g The PFM amplitude (blue) and phase (red) hysteresis loops by applied a reverse DC voltage of ±7 V in CuVP2S6 with thickness of 45 nm. h, i The PFM OOP phase (h) and OOP amplitude (i), images of CuVP2S6 nanoflake after writing a box-in-box pattern with opposite DC bias of ±7 V, respectively.

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