Sensory and short-term memory formations observed in a Ag2S gap-type atomic switch

Takeo Ohno, Tsuyoshi Hasegawa, Alpana Nayak, Tohru Tsuruoka, James K. Gimzewski, Masakazu Aono

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Memorization caused by the change in conductance in a Ag2S gap-type atomic switch was investigated as a function of the amplitude and width of input voltage pulses (Vin). The conductance changed little for the first few Vin, but the information of the input was stored as a redistribution of Ag-ions in the Ag2S, indicating the formation of sensory memory. After a certain number of Vin, the conductance increased abruptly followed by a gradual decrease, indicating the formation of short-term memory (STM). We found that the probability of STM formation depends strongly on the amplitude and width of Vin, which resembles the learning behavior of the human brain.

Original languageEnglish
Article number203108
JournalApplied Physics Letters
Issue number20
Publication statusPublished - 2011 Nov 14


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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