Quantized conductance is observed at zero magnetic field and 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 Go = 2e2/h (=12.91 kΩ−1), and in some devices partially quantized including a series of with (n/7) × Go, steps are observed. Such an organic memory device exhibits reliable memory operation with an on/off ratio of more than 10. We attribute the quantized conductance to the existence of a 1-D electron waveguide along the conductive path. The partial quantized conductance results likely from imperfect transmission coefficient due to impedance mismatch of the first waveguide modes.
CITATION STYLE
Kang, Y., Ruan, H., Claus, R. O., Heremans, J., & Orlowski, M. (2016). Observation of Quantized and Partial Quantized Conductance in Polymer-Suspended Graphene Nanoplatelets. Nanoscale Research Letters, 11(1). https://doi.org/10.1186/s11671-016-1387-8
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