168 citations · 361 across the 7 of their papers we have counts for
7 papers
Rectification of Vortex Motion in a Circular Ratchet Channel
N. S. Lin, T. W. Heitmann, K. Yu +2
We study the dynamics of vortices in an asymmetric ring channel driven by an external current I in a Corbino setup. The asymmetric potential can rectify the motion of vortices and…
Microstrip superconducting quantum interference device amplifiers with submicron Josephson junctions: enhanced gain at gigahertz frequencies
M. P. DeFeo, P. Bhupathi, K. Yu +4
We present measurements of an amplifier based on a dc superconducting quantum interference device (SQUID) with submicron Al-AlOx-Al Josephson junctions. The small junction size red…
Vortex dynamics in superconducting channels with periodic constrictions
K. Yu, M. B. S. Hesselberth, P. H. Kes +1
Vortices confined to superconducting easy flow channels with periodic constrictions exhibit reversible oscillations in the critical current at which vortices begin moving as the ex…
Reducing microwave loss in superconducting resonators due to trapped vortices
C. Song, M. P. Defeo, K. Yu +1
Microwave resonators with high quality factors have enabled many recent breakthroughs with superconducting qubits and photon detectors, typically operated in shielded environments…
Microwave response of vortices in superconducting thin films of Re and Al
C. Song, T. W. Heitmann, M. P. DeFeo +5
Vortices in superconductors driven at microwave frequencies exhibit a response related to the interplay between the vortex viscosity, pinning strength, and flux creep effects. At t…
Picovoltmeter for probing vortex dynamics in a single weak-pinning Corbino channel
T. W. Heitmann, K. Yu, C. Song +4
We have developed a picovoltmeter using a Nb dc Superconducting QUantum Interference Device (SQUID) for measuring the flux-flow voltage from a small number of vortices moving throu…