Moving Bragg Glass - Pictures

Plots related to the Moving Bragg Glass phase as described in Vortex dynamics in two-dimensional systems at high driving forces [1].

Heights of the following figures represent pinning potential (compare with figure 1 in [1]). Vortices are driven from the left to the right, and the system is in the moving Bragg glass régime. We take a time-averagered histogram as shown in figure 5 (left) in [1], and use a colorcode to visualise the histogram data: blue represents 0, red represents all values higher than some cut-off, and yellow and green represent intermediate values.

In summary, the "shape" of the surfaces represents the pinning potential, and the colors show the vortex density probability function.

Figure 1.
The first plot provides an overview. (Click on any figure for larger version.)

Figure 2.
The second diagram zooms into figure 1 to present more details.

Figure 3.
The third plot zooms even further (into the upper left corner of figure 2).

Figure 4.
The fourth plot is a "tilted" representation of the figure 2. This helps visualizing the pinning potential as a landscape, however, the paths of vortex motion are not completely visible because there are partially hidden.

The figures show how vortices have to follow paths that minimize pinning energy and (elastic) interaction energy at the same time.

Try also this link to see movies of the same system.

click me to go to movies ... camera closer to pinning camera attached to vortex looking in direction of motion

[1] Hans Fangohr, Simon J. Cox and Peter A.J. de Groot.
Vortex dynamics in two-dimensional systems at high driving forces.
Phys. Rev. B. 64, 064505. (2001) (Preprint available at cond-mat/0104455.)