Probing quasiparticle excitations in a hybrid single electron transistor

Abstract

We investigate the behavior of quasiparticles in a hybrid electron turnstile with the aim of improving its performance as a metrological current source. The device is used to directly probe the density of quasiparticles and monitor their relaxation into normal metal traps. We compare different trap geometries and reach quasiparticle densities below 3um^-3 for pumping frequencies of 20 MHz. Our data show that quasiparticles are excited both by the device operation itself and by the electromagnetic environment of the sample. Our observations can be modelled on a quantitative level with a sequential tunneling model and a simple diffusion equation.

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Cited by in corpus (29)

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• Tunnel-Junction Thermometry Down to Millikelvin Temperatures
• Quasiparticle trapping in Meissner and vortex states of mesoscopic superconductors
• Single Quantum Level Electron Turnstile
• Using materials for quasiparticle engineering
• Experimental realization of a Coulomb blockade refrigerator
• Extreme reductions of entropy in an electronic double dot
• Efficient thermionic operation and phonon isolation by a semiconductor-superconductor junction
• Relaxation of Nonequilibrium Quasiparticles in Mesoscopic Size Superconductors
• Proximity effect in normal-metal quasiparticle traps
• Joule spectroscopy of hybrid superconductor-semiconductor nanodevices
• Tunneling and Relaxation of Single Quasiparticles in a Normal-Superconductor-Normal Single Electron Transistor
• Active quasiparticle suppression in a non-equilibrium superconductor
• Detecting parity effect in a superconducting device in the presence of parity switches
• Frequency to power conversion by an electron turnstile
• Local and non-local two-electron tunneling processes in a Cooper pair splitter
• Non-equilibrium and proximity effects in superconductor-normal metal junctions
• Heat dissipation mechanisms in hybrid superconductor-semiconductor devices revealed by Joule spectroscopy
• Interplay of the inverse proximity effect and magnetic field in out-of-equilibrium single-electron devices
• A self-calibrating superconducting pair-breaking detector
• Inverse proximity effect in semiconductor Majorana nanowires
• Recovery of a SINIS turnstile accuracy in a strongly non-equilibrium regime
• Electron-phonon heat transfer in giant vortex states
• Zero-average bias bidirectional single-electron current generation in a hybrid turnstile
• Suppression of back-tunnelling events in hybrid single-electron turnstiles by source-drain bias modulation
• Revealing the internal spin dynamics in a double quantum dot by periodic voltage modulation