Non-Volatile Memory Based on Polymer-Suspended Graphene Nanoplatelets with Fractional and Integer Quantum Conductance at 300K and Zero Magnetic Field

摘要

Quantized conductance is observed at room temperature in metal-insulator-metal structures with graphene submicron-sized nanoplatelets embedded in a 3-hexylthiophene (P3HT) polymer layer. In devices with medium concentration of graphene platelets, integer multiples of conductance G_o=2e~2/h (=12.9 kΩ)~(-1) are observed. In some devices partial quantized conductance steps are observed, including a series with (n/7)×G_o steps. As an organic memory, the device exhibits reliable memory operation with an ON/OFF ratio of more than 10. We attribute the quantized conduction to the existence of a 1D electron waveguide along the conductive path. Such a memory device can be viewed as a realization of a quantum memristor.