Proximity nanovalve with large phase-tunable thermal conductance

Abstract

We propose a phase-controlled heat-flux quantum valve based on the proximity effect driven by a superconducting quantum interference proximity transistor (SQUIPT). Its operation relies on the phase-dependent quasiparticle density of states in the Josephson weak-link of the SQUIPT which controls thermal transport across the device. In a realistic Al/Cu-based setup the structure can provide efficient control of thermal current inducing temperature swings exceeding $\sim 100$~mK, and flux-to-temperature transfer coefficients up to $\sim 500$~mK/${\Phi }_0$ below 100~mK. The nanovalve performances improve by lowering the bath temperature, making the proposed structure a promising building-block for the implementation of coherent caloritronic devices operating below 1~K.

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Cited by in corpus (20)

• Towards phase-coherent caloritronics in superconducting circuits
• Phase-Tunable Thermal Logic: Computation with Heat
• High efficiency thermal switch based on topological Josephson junctions
• Coherent transport properties of a three-terminal hybrid superconducting interferometer
• Heat switch and thermoelectric effects based on Cooper-pair splitting and elastic cotunneling
• Coherent Josephson thermodynamic cycles
• Normal metal tunnel junction-based superconducting quantum interference proximity transistor: the N-SQUIPT
• Thermal superconducting quantum interference proximity transistor
• Reversible thermal diode and energy harvester with a superconducting quantum interference single-electron transistor
• Phase-Tunable Temperature Amplifier
• Spectral characteristics of a fully-superconducting SQUIPT
• Phase-coherent heat circulators with normal- or superconducting contacts
• Quasiparticle entropy in superconductor/normal metal/superconductor proximity junctions in the diffusive limit
• Thermodynamics in topological Josephson junctions
• Thermoelectric processes of quantum normal-superconductor interfaces
• Four-terminal graphene-superconductor thermal switch controlled by the superconducting phase difference
• Thermodynamics of a phase-driven proximity Josephson junction
• Mesoscopic Josephson junctions with switchable current-phase relation
• Out-of-equilibrium nonlinear model of thermoelectricity in superconducting tunnel junctions
• Photonic heat transport from weak to strong coupling