NOT gate response in a mesoscopic ring: An exact result - Condensed Matter > Mesoscale and Nanoscale PhysicsReport as inadecuate




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Abstract: We explore NOT gate response in a mesoscopic ring threaded by a magnetic flux$\phi$. The ring is attached symmetrically to two semi-infinite one-dimensionalmetallic electrodes and a gate voltage, viz, $V a$, is applied in one arm ofthe ring which is treated as the input of the NOT gate. The calculations arebased on the tight-binding model and the Green-s function method, whichnumerically compute the conductance-energy and current-voltage characteristicsas functions of the ring-to-electrodes coupling strength, magnetic flux andgate voltage. Our theoretical study shows that, for $\phi=\phi 0-2$$\phi 0=ch-e$, the elementary flux-quantum a high output current 1 in thelogical sense appears if the input to the gate is low 0, while a low outputcurrent 0 appears when the input to the gate is high 1. It clearly exhibitsthe NOT gate behavior and this aspect may be utilized in designing anelectronic logic gate.



Author: Santanu K. Maiti

Source: https://arxiv.org/



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