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Enhanced vortex damping by eddy currents in superconductor-semiconduc tor hybrids

M. Danckwerts A. R. Goni·C. Thomsen·K. Eberl·A. G. Rojo
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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.

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M. Danckwerts A. R. Goni, C. Thomsen, K. Eberl, A. G. Rojo. 2000-01-10. Enhanced vortex damping by eddy currents in superconductor-semiconduc tor hybrids. https://arxiv.org/abs/cond-mat/0001123

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