Transport through a mesoscopic cavity divided into two identical dots by a tunnel barrier is characterized by constructive interference among symmetric paths, which has the effect to enhance the transmission through the cavity itself. Since this symmetry can be broken by a magnetic field, this device can be used as a magnetic field sensor. We first discuss a tradeoff for the definition of the most convenient geometrical dimensions and then, with the inclusion of the variance due to electrical noise (specifically flicker noise) we find the maximum sensitivity that can be achieved with this device.
Analysis of the ultimate noise performance of a mesoscopic cavity magnetic sensor
M. Macucci;P. Marconcini
2019-01-01
Abstract
Transport through a mesoscopic cavity divided into two identical dots by a tunnel barrier is characterized by constructive interference among symmetric paths, which has the effect to enhance the transmission through the cavity itself. Since this symmetry can be broken by a magnetic field, this device can be used as a magnetic field sensor. We first discuss a tradeoff for the definition of the most convenient geometrical dimensions and then, with the inclusion of the variance due to electrical noise (specifically flicker noise) we find the maximum sensitivity that can be achieved with this device.File in questo prodotto:
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