Quantum interference effects on the noise power in the CNT/aGNR/CNT junction
Based on the tight-binding model and a generalized Greenʼs 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 an infinite single-walled carbon nanotube (SWCNT) as a CNT/aGNR/CNT system are numerically investigated. Changing electrode contact positions and applying magnetic field are considered as two sources of QI. 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 future nano-electronic devices.