Dynamics of superconducting nanowires shunted with an external resistor
arXiv:1202.4526 · doi:10.1103/PhysRevB.85.224507
Abstract
We present the first study of superconducting nanowires shunted with an external resistor, geared towards understanding and controlling coherence and dissipation in nanowires. The dynamics is probed by measuring the evolution of the V-I characteristics and the distributions of switching and retrapping currents upon varying the shunt resistor and temperature. Theoretical analysis of the experiments indicates that as the value of the shunt resistance is decreased, the dynamics turns more coherent presumably due to stabilization of phase-slip centers in the wire and furthermore the switching current approaches the Bardeen's prediction for equilibrium depairing current. By a detailed comparison between theory and experimental, we make headway into identifying regimes in which the quasi-one-dimensional wire can effectively be described by a zero-dimensional circuit model analogous to the RCSJ (resistively and capacitively shunted Josephson junction) model of Stewart and McCumber. Besides its fundamental significance, our study has implications for a range of promising technological applications.
15 pages, 14 figures
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- Formation of Quantum Phase Slip Pairs in Superconducting Nanowires
- General framework for transport in spin-orbit-coupled superconducting heterostructures: Nonuniform spin-orbit coupling and spin-orbit-active interfaces
- Self-Heating Hotspots in Superconducting Nanowires Cooled by Phonon Black-Body Radiation
- Controlling hysteresis in superconducting constrictions with a resistive shunt
- Maximizing switching current of superconductor nanowires via improved impedance matching
- Current-Crowding-Free Superconducting Nanowire Single-Photon Detectors
- Characterization of a Superconducting Microstrip Single-Photon Detector Shunted with an External Resistor
- Design and Performance of Parallel-channel Nanocryotrons in Magnetic Fields
- Stability of thermally bistable states and their switching in superconducting weak link
- Parallel Simulation of Josephson Junctions With Multiplicative Noise