title: Observation of Quantized and Partial Quantized Conductance in Polymer-Suspended Graphene Nanoplatelets.
abstract: 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 G o = 2e (2)/h (=12.91 kΩ(-1)), and in some devices partially quantized including a series of with (n/7) × G o, 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.
authors.affiliation: Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA, 24061, USA.|NanoSonic Inc., 158 Wheatland Drive, Pembroke, VA, 24136, USA.
authors.forename: Yuhong
authors.initials: Y
authors.lastname: Kang
authors.affiliation: NanoSonic Inc., 158 Wheatland Drive, Pembroke, VA, 24136, USA.
authors.forename: Hang
authors.initials: H
authors.lastname: Ruan
authors.affiliation: NanoSonic Inc., 158 Wheatland Drive, Pembroke, VA, 24136, USA.
authors.forename: Richard O
authors.initials: RO
authors.lastname: Claus
authors.affiliation: Physics Department, Virginia Tech, Blacksburg, VA, 24061, USA.
authors.forename: Jean
authors.initials: J
authors.lastname: Heremans
authors.affiliation: Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA, 24061, USA. m.orlowski@vt.edu.
authors.forename: Marius
authors.initials: M
authors.lastname: Orlowski
keywords: Electron waveguide; Graphene nanoribbons; Memristor; Partial and integer quantum conductance; Resistive memory; Transmission coefficient