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Mesoscopic resistive switch: non-volatility, hysteresis and negative differential resistance
journal contributionposted on 19.08.2015, 15:57 by Sergey SavelievSergey Saveliev, Fabio Marchesoni, A.M. Bratkovsky
We show how a simple model nanoswitch can perform as a memory resistor. Its resistance is determined by electron tunneling through a nanoparticle diffusing around one or more potential minima located between the electrodes in the presence of Joule’s heat dissipation. In the case of a single potential minimum, we observe hysteresis of the resistance at finite applied currents and negative differential resistance. For two (or more) minima the switching mechanism is non-volatile, meaning that the memristor can switch to a resistive state of choice and stay there. Moreover, the noise spectra of the switch exhibit 1/f2 → 1/f crossover, in agreement with recent experimental results.
S.E.S. acknowledges support from The Leverhulme Trust and Ministry of Science of Montenegro, under Contract No. 01-682; F.M. acknowledges support from the European Commission, Grant No. 256959 (NanoPower).