Enhanced Conductance Fluctuation by Quantum Confinement Effect in Graphene Nanoribbons

Abstract

Conductance fluctuation is usually unavoidable in graphene nanoribbons (GNR) due to the presence of disorder along its edges. By measuring the low-frequency noise in GNR devices, we find that the conductance fluctuation is strongly correlated with the density-of-states of GNR. In single-layer GNR, the gate-dependence of noise shows peaks whose positions quantitatively match the subband positions in the band structures of GNR. This correlation provides a robust mechanism to electrically probe the band structure of GNR, especially when the subband structures are smeared out in conductance measurement.

to appear in Nano Letters

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Cited by in corpus (7)

• Review of the Low-Frequency 1/f Noise in Graphene Devices
• Effective confining potential of quantum states in disordered media
• Impurities as a source of flicker noise in graphene
• Variability Effects in Graphene: Challenges and Opportunities for Device Engineering and Applications
• Suspending Effect on Low-Frequency Charge Noise in Graphene Quantum Dot
• Band edge noise spectroscopy of a magnetic tunnel junction
• Giant conductance and phase time anomalous events of hole quantum transport