Thermal superconducting quantum interference proximity transistor

Superconductors are excellent thermal insulators at low temperatures owing to the presence of an energy gap in their density states1. Through so-called proximity effect2, superconductors can influence states nearby metallic or superconducting wires. In this way, local a wire be tuned by controlling phase bias (φ) imposed across it3. Here we demonstrate quantum interference transistor (T-SQUIPT) that enables control heat currents exploiting effect. Our T-SQUIPT device comprises quasi-one-dimensional aluminium nanowire forming weak link embedded ring4,5. Controlling changing magnetic flux through ring shows temperature modulations up 16 mK, yielding temperature-to-flux transfer function reaches approximately 60 mK Φ0–1. We also hysteretic dependence T-SQUIPTs on applied field due phase-slip transitions. This allows operate as phase-tunable memory6,7, where information is encoded mesoscopic island. Heat transport electronic systems influenced Combining with manipulation superconductivity using fields nanoscale transport.