Electrostatics of Vortices in Type-II Superconductors
Gianni Blatter, Mikhail Feigel'man, Vadim Geshkenbein, Anatoli Larkin, Anne van Otterlo
DOI 10.1103/PhysRevLett.77.566 · Physical Review Letters
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Abstract
In a type-II superconductor the gap variation in the core of a vortex line induces a local charge modulation. Accounting for metallic screening, we determine the line charge of individual vortices and calculate the electric field distribution in the half space above a field penetrated superconductor. The resulting field is that of an atomic size dipole d∼eaBz^, aB=ħ2/me2 is the Bohr radius, acting on a force microscope in the pico- to femto-Newton range.
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