Noise effects in the nonlinear thermoelectricity of a Josephson junction

Abstract

We investigate the noise current in a thermally biased tunnel junction between two superconductors with different zero-temperature gaps. When the Josephson effect is suppressed, this structure can support a nonlinear thermoelectric effect due to the spontaneous breaking of electron-hole symmetry, as we recently theoretically predicted. We discuss the possibly relevant role played by the noise in the junction. While a moderate noise contribution assists the generation of the thermoelectric signal, further unveiling the spontaneous nature of the electron-hole symmetry breaking, a large noise contribution can induce a switching between the two stationary thermoelectric values, thus hardening the detection of the effect and its application. We demonstrate that the thermoelectric effect is robust to the presence of noise for a wide range of parameters and that the spurious fluctuations of the thermoelectric signal can be lowered by increasing the capacitance of the junction, for instance by expanding the junction's size. Our results pave the way to the future experimental observation of the thermoelectric effect in superconducting junctions, and to improved performance in quantum circuits designed for thermal management.

References in corpus (25)

• Energy Dissipation and Transport in Nanoscale Devices
• Opportunities for mesoscopics in thermometry and refrigeration: Physics and applications
• The European Quantum Technologies Roadmap
• Quantum thermal transport in nanostructures
• The Josephson heat interferometer
• Electron shot noise beyond the second moment
• Nonlocal Thermoelectric Effects and Nonlocal Onsager Relations in a Three-Terminal Proximity-Coupled Superconductor-Ferromagnet Device
• Huge thermoelectric effects in ferromagnet-superconductor junctions in the presence of a spin-splitting field
• Micrometre-scale refrigerators
• Thermal transport in nanostructures
• Observation of thermoelectric currents in high-field superconductor-ferromagnet tunnel junctions
• Towards phase-coherent caloritronics in superconducting circuits
• Anomalous Heat Conduction and Anomalous Diffusion in Low Dimensional Nanoscale Systems
• Observation of negative absolute resistance in a Josephson junction
• Thermal, electric and spin transport in superconductor/ferromagnetic-insulator structures
• Ferromagnetic insulator-based superconducting junctions as sensitive electron thermometers
• Nonlinear thermoelectricity with electron-hole symmetric systems
• Josephson Quantum Heat Engine
• Thermoelectric effects in superconductor-ferromagnet tunnel junctions on europium sulfide
• Nonlocal Thermoelectricity in a S-TI-S Junction in Contact with a N-Metal Probe: Evidence for Helical Edge States
• Josephson thermal memory
• Electron and phonon Cooling in a Superconductor - Normal Metal - Superconductor Tunnel Junction
• A superconducting nonlinear thermoelectric heat engine
• Phase-tunable thermoelectricity in a Josephson junction
• On-Chip Cooling by Heating with Superconducting Tunnel Junctions

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• Microwave-assisted thermoelectricity in SIS' tunnel junctions
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