Frequency Pulling and Mixing of Relaxation Oscillations in Superconducting Nanowires
Emily Toomey, Qing-Yuan Zhao, Adam N. McCaughan, Karl K. Berggren
DOI 10.1103/PhysRevApplied.9.064021 · Physical Review Applied
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Many superconducting technologies such as rapid single-flux quantum computing and superconducting quantum-interference devices rely on the modulation of nonlinear dynamics in Josephson junctions for functionality. More recently, however, superconducting devices have been developed based on the switching and thermal heating of nanowires for use in fields such as single-photon detection and digital logic. In this paper, we use resistive shunting to control the nonlinear heating of a superconducting nanowire and compare the resulting dynamics to those observed in Josephson junctions. We show that interaction of the hotspot-impedance with an external shunt produces high-frequency relaxation oscillations with similar behavior to that observed in Josephson junctions due to their ability to be modulated by a weak periodic signal. In particular, we use a microwave drive to pull and mix the oscillation frequency, resulting in phase-locked features that resemble the Shapiro steps observed in the ac Josephson effect. Microwave nanowire devices based on these conclusions have promising applications in fields such as parametric amplification and frequency mixing.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10.5 | Pressure not reported | onset |
Similar papers
Frequency pulling and mixing of relaxation oscillations in superconducting nanowires
similarity 0.98Emily Toomey et al. · 2017 · arXiv:1709.06598
Source status unknown — claims are unverified
Anomalous Terahertz Nonlinearity in Disordered s-Wave Superconductor Close to the Superconductor-Insulator Transition
similarity 0.95Hao Wang et al.
Source status unknown — claims are unverified
Timing jitter in photon detection by straight superconducting nanowires: Effect of magnetic field and photon flux
similarity 0.94Mariia Sidorova et al.
Source status unknown — claims are unverified
Dynamic fluctuations in the superconductivity of NbN films from microwave conductivity measurements
similarity 0.94Takeyoshi Ohashi et al.
Source status unknown — claims are unverified
Nonlinear electrodynamics of superconducting NbN and Nb thin films at microwave frequencies
similarity 0.94C. C. Chin et al.
Source status unknown — claims are unverified
High-impedance superconducting resonators and on-chip filters for circuit quantum electrodynamics with semiconductor quantum dots
similarity 0.94X. Zhang et al.
Source status unknown — claims are unverified