Pumped shot noise in adiabatically modulated graphene-based double-barrier structures
Rui Zhu, Maoli Lai
TL;DR
This paper studies the quantum shot noise in graphene double-barrier structures under adiabatic modulation, revealing enhanced noise linked to the Klein paradox and current flow reversal.
Contribution
It derives general expressions for pumped shot noise in phase-coherent conductors and highlights the impact of the Klein paradox on noise behavior.
Findings
PSN is dramatically enhanced during current reversal
Klein paradox significantly affects shot noise
Derived general expressions for adiabatic PSN
Abstract
Quantum pumping processes are accompanied by considerable quantum noise. We investigated the pumped shot noise (PSN) properties in adiabatically modulated graphene-based double-barrier structures. General expressions for adiabatically PSN in phase-coherent mesoscopic conductors are derived based on the scattering approach. It is found that comparing with the Poisson processes, the PSN is dramatically enhanced where the dc pumped current changes flow direction, which demonstrates the effect of the Klein paradox.
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