Radiofrequency generation by coherently moving fluxons
arXiv:1804.00856 · doi:10.1063/1.5028213
Abstract
A lattice of Abrikosov vortices in type II superconductors is characterized by a periodic modulation of the magnetic induction perpendicular to the applied magnetic field. For a coherent vortex motion under the action of a transport current, the magnetic induction at a given point of the sample varies in time with a washboard frequency f_WB = v/d, where v is the vortex velocity and d is the distance between the vortices in the direction of motion. Here, by using a spectrum analyzer connected to a 50 nm-wide Au nanowire meander near the surface of a superconducting Nb film we detect an ac voltage induced by coherently moving fluxons. The voltage is peaked at the washboard frequency, f_WB, and its subharmonics, f_TOF = f_WB/5, determined by the antenna width. By sweeping the dc current value, we reveal that f_WB can be tuned from 100 MHz to 1.5 GHz, thereby demonstrating that patterned normal metal/superconductor nanostructures can be used as dc-tunable generators operating in the radiofrequency range.
arXiv comment14 pages, 4 figures
References in corpus (16)
- The Flux-Line Lattice in Superconductors
- Scanning nano-SQUID with single electron spin sensitivity
- Nonequilibrium Dynamic Phase Diagram for Vortex Lattices
- Imaging of super-fast dynamics and flow instabilities of superconducting vortices
- Reliable determination of vortex parameters from measurements of the microwave complex resistivity
- Fractal Networks, Braiding Channels, and Voltage Noise in Intermittently Flowing Rivers of Quantized Magnetic Flux
- Superconducting single photon detectors integrated with diamond nanophotonic circuits
- Emergent nanoscale superparamagnetism at oxide interfaces
- Fluctuations and Noise Signatures of Driven Magnetic Skyrmions
- Abrikosov fluxonics in washboard nanolandscapes
- Dual cut-off dc-tunable microwave low-pass filter on superconducting Nb microstrips with asymmetric nanogrooves
- AC-driven microwave loss modulation in a fluxonic metamaterial
- Frequency-dependent ratchet effect in superconducting films with a tilted washboard pinning potential
- Pinning effects on self-heating and flux-flow instability in superconducting films near
- Thermally driven inhibition of superconducting vortex avalanches
- Electromagnetic radiation from vortex flow in type-II superconductors
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- Vortex counting and velocimetry for slitted superconducting thin strips
- Reduction of microwave loss by mobile fluxons in grooved Nb films
- Growth optimization of TaN for superconducting spintronics
- Nonreciprocal magnon fluxonics upon ferromagnet/superconductor hybrids