|Title||Time-dependent London approach: Dissipation due to out-of-core normal excitations by moving vortices|
|Publication Type||Journal Article|
|Year of Publication||2018|
|Journal||Physical Review B|
|Type of Article||Article|
|Keywords||mixed-state, physics, superconductors, vortex lattice|
The dissipative currents due to normal excitations are included in the London description. The resulting time-dependent London equations are solved for a moving vortex and a moving vortex lattice. It is shown that the field distribution of a moving vortex loses its cylindrical symmetry. It experiences contraction that is stronger in the direction of the motion than in the direction normal to the velocity v. The London contribution of normal currents to dissipation is small relative to the Bardeen-Stephen core dissipation at small velocities, but it approaches the latter at high velocities, where this contribution is no longer proportional to v(2). To minimize the London contribution to dissipation, the vortex lattice is oriented so as to have one of the unit cell vectors along the velocity. This effect is seen in experiments and predicted within the time-dependent Ginzburg-Landau theory.
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