Journal
APPLIED PHYSICS LETTERS
Volume 107, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4935220
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Funding
- Defense Advanced Research Projects Agency (DARPA) [HR0011-13-2-0015]
- National Science Foundation (NSF) [CCF-1217972]
- Division of Computing and Communication Foundations
- Direct For Computer & Info Scie & Enginr [1217972] Funding Source: National Science Foundation
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We show temporal and frequency information can be effectively encoded in memristive devices with inherent short-term dynamics. Ag/Ag2S/Pd based memristive devices with low programming voltage (similar to 100 mV) were fabricated and tested. At weak programming conditions, the devices exhibit inherent decay due to spontaneous diffusion of the Ag atoms. When the devices were subjected to pulse train inputs emulating different spiking patterns, the switching probability distribution function diverges from the standard Poisson distribution and evolves according to the input pattern. The experimentally observed switching probability distributions and the associated cumulative probability functions can be well-explained using a model accounting for the short-term decay effects. Such devices offer an intriguing opportunity to directly encode neural signals for neural information storage and analysis. (C) 2015 AIP Publishing LLC.
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