Highly-sensitive superconducting quantum interference proximity transistor

Abstract

We report the design and implementation of a high-performance superconducting quantum interference proximity transistor (SQUIPT) based on aluminum-copper (Al-Cu) technology. With the adoption of a thin and short copper nanowire we demostrate full phase-driven modulation of the proximity-induced minigap in the normal metal density of states. Under optimal bias we record unprecedently high flux-to-voltage (up to 3 mV/${\Phi }_0$) and flux-to-current (exceeding 100 nA/${\Phi }_0$) transfer function values at sub-Kelvin temperatures, where ${\Phi }_0$ is the flux quantum. The best magnetic flux resolution (as low as 500 n${\Phi }_0/\sqrt{Hz}$ at 240 mK, being limited by the room temperature pre-amplification stage) is reached under fixed current bias. These figures of merit combined with ultra-low power dissipation and micrometer-size dimensions make this mesoscopic interferometer attractive for low-temperature applications such as the investigation of the magnetization of small spin populations.

7 pages, 5 color figures

References in corpus (15)

• Opportunities for mesoscopics in thermometry and refrigeration: Physics and applications
• Scanning nano-SQUID with single electron spin sensitivity
• Phase controlled superconducting proximity effect probed by tunneling spectroscopy
• Photon assisted tunneling as an origin of the Dynes density of states
• SQUIPT - Superconducting Quantum Interference Proximity Transistor
• Density of states and supercurrent in diffusive SNS junctions: role of nonideal interfaces and spin-flip scattering
• Superconducting quantum interference devices with submicron Nb/HfTi/Nb junctions for investigation of small magnetic particles
• Trapping hot quasi-particles in a high-power superconducting electronic cooler
• Thermoelectric effects in superconducting proximity structures
• Nb nano superconducting quantum interference devices with high spin sensitivity for operation in magnetic fields up to 0.5\,T
• Tunnel Spectroscopy of a Proximity Josephson Junction
• Hybrid superconducting quantum magnetometer
• Josephson current in nanofabricated V/Cu/V mesoscopic junctions
• MicroSQUIDs based on V/Cu/V Josephson nanojunctions
• Balanced double-loop mesoscopic interferometer based on Josephson proximity nanojunctions

Cited by in corpus (37)

• Metallic supercurrent field-effect transistor
• Towards phase-coherent caloritronics in superconducting circuits
• The $\omega$-SQUIPT: phase-engineering of Josephson topological materials
• NanoSQUIDs: Basics & recent advances
• Coherent transport properties of a three-terminal hybrid superconducting interferometer
• Non-invasive thermometer based on proximity superconductor for ultra-sensitive calorimetry
• Coherent Josephson thermodynamic cycles
• Phase-tunable thermal rectification in the topological SQUIPT
• Normal metal tunnel junction-based superconducting quantum interference proximity transistor: the N-SQUIPT
• Proximity nanovalve with large phase-tunable thermal conductance
• Full electrostatic control of quantum interference in an extended trenched Josephson junction
• Low-temperature characterization of Nb-Cu-Nb weak links with Ar ion-cleaned interfaces
• Thermal superconducting quantum interference proximity transistor
• Phase-driven collapse of the Cooper condensate in a nanosized superconductor
• A Topological SQUIPT based on helical edge states in proximity to superconductors
• Spectral characteristics of a fully-superconducting SQUIPT
• Electron cooling with graphene-insulator-superconductor tunnel junctions and applications to fast bolometry
• High operating temperature in V-based superconducting quantum interference proximity transistors
• Josephson Coupling in the Dissipative State of a Thermally Hysteretic $\mu$-SQUID
• Superconducting Quantum Interference Single-Electron Transistor
• A femto-Tesla DC SQUID design for quantum-ready readouts
• Interplay of the inverse proximity effect and magnetic field in out-of-equilibrium single-electron devices
• Phase-Controllable Nonlocal Spin Polarization in Proximitized Nanowires
• Phase-driven charge manipulation in Hybrid Single-Electron Transistor
• Efficient electronic cooling above 2 K by niobium-based superconducting tunnel junctions
• Mesoscopic Josephson junctions with switchable current-phase relation
• Thermodynamics of a phase-driven proximity Josephson junction
• Ultra linear magnetic flux-to-voltage conversion in superconducting quantum interference proximity transistors
• Bipolar thermoelectrical SQUIPT (BTSQUIPT)
• Magnetometry with low resistance proximity Josephson junction
• Inductive Superconducting Quantum Interference Proximity Transistor: the L-SQUIPT
• Flux pumping of Cooper pairs through a Josephson Energy-Suppression Pump
• Phase-Biased Andreev Diffraction Grating
• Phase relations in superconductor-normal metal-superconductor tunnel junctions
• Noise of a superconducting magnetic flux sensor based on a proximity Josephson junction
• The stationary SQUID
• Boundary conditions for the order parameter and the proximity influenced internal phase differences in double superconducting junctions