Vortex configurations and dynamics in elliptical pinning sites for high matching fields

Details Vortex configurations and dynamics in elliptical pinning sites for high matching fields Vortex configurations and dynamics in elliptical pinning sites for high matching fields

2005-12-31

arxiv.org/abs/cond-mat/0601008v1

Phys. Rev. B 73, 184519 (2006)

Physics

Condensed Matter

Superconductivity

11 pages, 13 postscript figures

Scientific paper

10.1103/PhysRevB.73.184519

Using numerical simulations we study the configurations, dynamics, and melting properties of vortex lattices interacting with elliptical pinning sites at integer matching fields with as many as 27 vortices per pin. Our pinning model is based on a recently produced experimental system [G. Karapetrov et al., Phys. Rev. Lett. 95, 167002 (2005)], and the vortex configurations we obtain match well with experimental vortex images from the same system. We find that the strong pinning sites capture more than one vortex each, and that the saturation number of vortices residing in a pin increases with applied field due to the pressure from the surrounding vortices. At high matching fields, the vortices in the intestitial regions form a disordered triangular lattice. We measure the depinning thresholds for both the x and y directions, and find distinctive dynamical responses along with highly anisotropic thresholds. For melting of the vortex configurations under zero applied current, we find multi-step melting transitions in which the interstitial vortices melt at a much lower temperature than the pinned vortices. We associate this with signatures in the specific heat.

Affiliated with

Also associated with

No associations

Rating

Vortex configurations and dynamics in elliptical pinning sites for high matching fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Vortex configurations and dynamics in elliptical pinning sites for high matching fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vortex configurations and dynamics in elliptical pinning sites for high matching fields will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-284316