On Three "Anomalous" Measurements of Nonlinear QPC Conductance
arXiv:2206.10147 · doi:10.3390/condmat7030049
Abstract
Practical mesoscopic devices based on quantum point contacts (QPCs) must function at operating point involving large internal driving fields. Experimental evidence has accumulated to display anomalous nonlinear features of QPC response beyond the capacities of accepted tunnelling-based models of nonlinear quantum transport. Here we recall the physical setting of three anomalous QPC experiments and review how, for two of them, a microscopically based nonequilibrium quantum kinetic description (the correct physical boundary conditions being crucial) has already overcome the predictive limitations of standard nonequilibrium mesoscopic models. The third experiment remains a significant challenge to all theorists.
arXiv commentReview of nonlinear QPC transport, 8pp, 4 figs. Updated 220822. Title altered, references added. Additional comments added
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