Enhanced vortex damping by eddy currents in superconductor-semiconduc tor hybrids
Superconductivity
2007-05-23 v1
Abstract
An enhancement of vortex-motion damping in thin Pb/In superconducting films is obtained through coupling to an adjacent two-dimensional electron gas formed in a modulation-doped GaAs/AlGaAs heterostructure. This effect is observed by monitoring the power dissipation at the superconductor in the vortex state while increasing the density of the electron gas using a gate voltage. Quantitative agreement is found with calculations based on a viscous model of vortex damping which considers generation of eddy currents in the electron gas by moving flux lines. In the regime of filamentary and channel vortex flow, eddy-current damping leads to striking dissipation breakdown due to stopping of entire vortex channels.
Keywords
Cite
@article{arxiv.cond-mat/0001123,
title = {Enhanced vortex damping by eddy currents in superconductor-semiconduc tor hybrids},
author = {M. Danckwerts A. R. Goni and C. Thomsen and K. Eberl and A. G. Rojo},
journal= {arXiv preprint arXiv:cond-mat/0001123},
year = {2007}
}
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