Quantum interference effects on the noise power in the CNT/aGNR/CNT junction

Abstract

Based on tight-binding model and a generalized Green's function method in Landauer-Büttiker formalism, the effects of quantum interference (QI) on the noise power and Fano factor of an armchair graphene nanoribbon (aGNR) sandwiched between infinite single wall carbon nanotube (SWCNT) as a CNT/aGNR/CNT system are numerically investigated. In this work, changing the aGNR to CNT electrodes contact positions and applying the magnetic field as two sources of QI are considered. We have found different Fano-resonance and anti-resonance peaks on the transmission probability in the presence of QI sources that show profound effects on the current-voltage characteristics and noise power. Our results also show that the shot noise characteristic, either in the Poisson limit ($F=1$) or sub-Poisson limit ($F<1$), and also maximum value of the Fano factor strongly depend on the aGNR to CNT electrodes contact positions and the magnetic field strength. These results can be useful for designing the future nano-electronic devices.

arXiv comment13 pages, 7 figures

References in corpus (15)

• Shot Noise in Mesoscopic Conductors
• Quantum interference and Klein tunneling in graphene heterojunctions
• Aharonov-Bohm effect in graphene
• Electronic transport properties of graphene nanoribbons
• Shot Noise in Graphene
• Graphene Rings in Magnetic Fields: Aharonov-Bohm Effect and Valley Splitting
• Shot Noise with Interaction Effects in Single Walled Carbon Nanotubes
• Simplified model for the energy levels of quantum rings in single layer and bilayer graphene
• Revivals, classical periodicity, and zitterbewegung of electron currents in monolayer graphene
• Interplay of the Aharonov-Bohm effect and Klein tunneling in graphene
• Shot Noise in Magnetic Tunnel Junctions: Evidence for Sequential Tunneling
• Fingerprints of mesoscopic leads in the conductance of a molecular wire
• Shot noise of inelastic tunneling through quantum dot systems
• Quantum interference effects in electron transport through nitrobenzene with pyridil anchor groups
• Transport in coupled graphene-nanotube quantum devices