Effective action for vortex dynamics in cleand-wave superconductors

From Effective Bcs Action to Vortex Dynamics

The topological term in the effective action for the electrically neutral BCS system is discussed. It is applied for the calculation of the transverse force acting on the vortex in the limit of the smooth vor-tex core and vanishing interlevel distance in the vortex core. The controversy between the topological terms in cond-mat/9703124 and cond-mat/9411047 is resolved.

Vortex lattice transition in D-wave superconductors

Making use of the extended Ginzburg Landau theory, which includes the fourth order derivative term, we study the vortex state in a magnetic field parallel to the c axis. The vortex core structure is distorted due to this higher order term, which reveals the fourfold symmetry. Further, this distortion gives rise to the core interaction energy, which favors a square lattice tilted by 45 from the ...

Vortex structure in d-wave superconductors.

Vortex structure of pure d x 2 y 2 -wave superconductors is microscopically analyzed in the framework of the quasi-classical Eilenberger equations. Selfconsistent solution for the d-wave pair potential is obtained for the rst time in the case of an isolated vortex. The vortex core structure, i.e., the pair potential, the supercurrent and the magnetic eld, is found to be fourfold symmetric even ...

Vortex dynamics for low- type-II superconductors

Wave - vortex dynamics

Numerical studies of two-dimensional turbulence show the importance of localised structures, both in the small scales where intermittent transfers occur and in the large scales dominated by coherent vortices. This work is an attempt to establish a more appropriate theoretical framework than the usual Fourier representation. We present a dual representation, mixing continuous field and point vor...