Low-frequency diffusion noise in resistive-switching memories based on metal-oxide polymer structure

Rocha, P. R. F.; Gomes, Henrique L.; Vandamme, L. K. J.; Chen, Q.; Kiazadeh, Asal; De Leeuw, Dago M.; Meskers, S. C. J.

http://hdl.handle.net/10400.1/3260

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Abstract(s)

Low-frequency noise is studied in resistive-switching memories based on metal–oxide polymer diodes. The noise spectral power follows a 1/fγ behavior, with γ = 1 in the ohmic region and with γ = 3/2 at high bias beyond the ohmic region. The exponent γ = 3/2 is explained as noise caused by Brownian motion or diffusion of defects which induce fluctuations in diode current. The figure of merit to classify 1/f noise in thin films has an estimated value of 10−21 cm2/Ω, which is typical for metals or doped semiconductors. This value in combination with the low diode current indicates that the 1/f noise is generated in the narrow localized regions in the polymer between the contacts. The analysis unambiguously shows that the current in bistable nonvolatile memories is filamentary.

Keywords

Diffusion noise Electrical properties Lowfrequency noise Nonvolatile memory Random telegraph noise Resistive switching

URI

http://hdl.handle.net/10400.1/3260

Citation

Rocha, P. R. F.; Gomes, H. L.; Vandamme, L. K. J.; Chen, Q.; Kiazadeh, A.; De Leeuw, D. M.; Meskers, S. C.J. Low-frequency diffusion noise in resistive-switching memories based on metal-oxide polymer structure, IEEE Transactions on Electron Devices, 59, 9, 2483-24, 2012.