Radio-frequency characterization of a supercurrent transistor made from a carbon nanotube

Abstract

A supercurrent transistor is a superconductor-semiconductor hybrid device in which the Josephson supercurrent is switched on and off using a gate voltage. While such devices have been studied using DC transport, radio-frequency measurements allow for more sensitive and faster experiments. Here a supercurrent transistor made from a carbon nanotube is measured simultaneously via DC conductance and radio-frequency reflectometry. The radio-frequency measurement resolves all the main features of the conductance data across a wide range of bias and gate voltage, and many of these features are seen more clearly. These results are promising for measuring other kinds of hybrid superconducting devices, in particular for detecting the reactive component of the impedance, which a DC measurement can never detect.

References in corpus (26)

• A Semiconductor Nanowire-Based Superconducting Qubit
• Quantum supercurrent transistors in carbon nanotubes
• Josephson ${\phi }_0$-junction in nanowire quantum dots
• Realization of microwave quantum circuits using hybrid superconducting-semiconducting nanowire Josephson elements
• Coupling a quantum dot, fermionic leads and a microwave cavity on-chip
• Multiple Andreev Reflections in a Carbon Nanotube Quantum Dot
• Direct microwave measurement of Andreev-bound-state dynamics in a proximitized semiconducting nanowire
• Spin-orbit splitting of Andreev states revealed by microwave spectroscopy
• Charge and spin state readout of a double quantum dot coupled to a resonator
• Magnetic field resilient superconducting coplanar waveguide resonators for hybrid cQED experiments
• Measuring the complex admittance of a carbon nanotube double quantum dot
• Sensitive radio-frequency measurements of a quantum dot by tuning to perfect impedance matching
• Coupling carbon nanotube mechanics to a superconducting circuit
• 0-$\pi$ quantum transition in a carbon nanotube Josephson junction: universal phase dependence and orbital degeneracy
• Clean carbon nanotubes coupled to superconducting impedance-matching circuits
• Charge sensing in carbon nanotube quantum dots on microsecond timescales
• Printed Circuit Board Metal Powder Filters for Low Electron Temperatures
• Carbon Nanotube Quantum Dots with Nb Contacts
• Realization of a Carbon-Nanotube-Based Superconducting Qubit
• Dispersive readout of Majorana qubits
• Josephson inductance as a probe for highly ballistic semiconductor-superconductor weak links
• Microwave signature of robust topological Andreev-level crossings in superconducting proximitized crystalline Bi nanowires
• Fabrication and characterisation of nanospintronic devices
• Radio-frequency reflectometry of a quantum dot using an ultra-low-noise SQUID amplifier
• Controlled DC Monitoring of a Superconducting Qubit
• Supercurrent through a spin-split quasi-ballistic point contact in an InAs nanowire