Voltage from mechanical stress in type-II superconductors: Depinning of the magnetic flux by moving dislocations

Details Voltage from mechanical stress in type-II superconductors: Depinning of the magnetic flux by moving dislocations Voltage from mechanical stress in type-II superconductors: Depinning of the magnetic flux by moving dislocations

2008-02-27

arxiv.org/abs/0802.4107v2

Physics

Condensed Matter

Superconductivity

3 pages, 1 figures

Scientific paper

10.1063/1.2960337

Mechanical stress causes motion of defects in solids. We show that in a type-II superconductor a moving dislocation generates a pattern of current that exerts the depinning force on the surrounding vortex lattice. Concentration of dislocations and the mechanical stress needed to produce critical depinning currents are shown to be within practical range. When external magnetic field and transport current are present this effect generates voltage across the superconductor. Thus a superconductor can serve as an electrical sensor of the mechanical stress.

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