Highly Sensitive Superconducting Quantum-Interference Proximity Transistor

Abstract

Superconducting quantum interference proximity transistors (SQUIPTs) are ultralow-power magnetic interferometers showing impressive magnetic flux response. An optimized nanofabricated geometry realizes a sensitivity so high that it is limited by the noise from room-temperature preamplification. This study demonstrates that SQUIPTs can achieve state-of-the-art sensors for magnetometric applications at micrometer scales.