Actions for Moving vortex phases, dynamical symmetry breaking, and jamming for vortices in honeycomb pinning arrays [electronic resource].

Email RIS file
Bookmark
Report an Issue

Moving vortex phases, dynamical symmetry breaking, and jamming for vortices in honeycomb pinning arrays [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2008.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
We show using numerical simulations that vortices in honeycomb pinning arrays can exhibit a remarkable variety of dynamical phases that are distinct from those found for triangular and square pinning arrays. In the honeycomb arrays, it is possible for the interstitial vortices to form dimer or higher n-mer states which have an additional orientational degree of freedom that can lead to the formation of vortex molecular crystals. For filling fractions where dimer states appear, a dynamical symmetry breaking can occur when the dimers flow in one of two possible alignment directions. This leads to transport in the direction transverse to the applied drive. We show that dimerization produces distinct types of moving phases which depend on the direction of the driving force with respect to the pinning lattice symmetry. When the dimers are driven along certain directions, a reorientation of the dimers can produce a jamming phenomenon which results in a strong enhancement in the critical depinning force. The jamming can also cause unusual effects such as an increase in the critical depinning force when the size of the pinning sites is reduced.
Report Numbers
E 1.99:la-ur-08-04665
E 1.99: la-ur-08-4665
la-ur-08-4665
la-ur-08-04665
Other Subject(s)
Note
Published through SciTech Connect.
01/01/2008.
"la-ur-08-04665"
" la-ur-08-4665"
Physical Review B 78 22 ISSN 1098-0121 FT
Reichhardt, Charles; Reichhardt, Cynthia.
Funding Information
AC52-06NA25396
View MARC record | catkey: 14445492