Optimized proximity thermometer for ultra-sensitive detection
arXiv:1911.02844 · doi:10.1103/PhysRevApplied.13.054001
Abstract
We present a set of experiments to optimize the performance of the noninvasive thermometer based on proximity superconductivity. Current through a standard tunnel junction between an aluminum superconductor and a copper electrode is controlled by the strength of the proximity induced to this normal metal, which in turn is determined by the position of a direct superconducting contact from the tunnel junction. Several devices with different distances were tested. We develop a theoretical model based on Usadel equations and dynamic Coulomb blockade which reproduces the measured results and yields a tool to calibrate the thermometer and to optimize it further in future experiments.
References in corpus (13)
- Quasiclassical Green's function approach to mesoscopic superconductivity
- Local Density of States in a Dirty Normal Metal connected to a Superconductor
- Density of states and supercurrent in diffusive SNS junctions: role of nonideal interfaces and spin-flip scattering
- Nanobolometer with Ultralow Noise Equivalent Power
- GaAs Quantum Dot Thermometry Using Direct Transport and Charge Sensing
- Phonon bottleneck in graphene-based Josephson junctions at millikelvin temperatures
- Nanosecond thermometry with Josephson junction
- Incomplete measurement of work in a dissipative two level system
- 500 microkelvin nanoelectronics
- Fast thermometry with a proximity Josephson junction
- Non-invasive thermometer based on proximity superconductor for ultra-sensitive calorimetry
- A non-invasive electron thermometer based on charge sensing of a quantum dot
- Crossover between electron-phonon and boundary resistance limited thermal relaxation in copper films
Cited by in corpus (7)
- Calorimetry of a Quantum Phase Slip
- Quasi-probabilities of work and heat in an open quantum system
- Measurement of work and heat in the classical and quantum regimes
- Applications of Superconductor-Normal Metal Interfaces
- A self-calibrating superconducting pair-breaking detector
- Optimized proximity thermometer for ultrasensitive detection: Role of an ohmic electromagnetic environment
- Photonic Negative Differential Thermal Conductance Enabled by NIS Junctions