Symmetry locking and commensurate vortex domain formation in periodic pinning arrays
Grigorenko, A.N., Bending, S.J., Van Bael, M.J., Lange, M., Moshchalkov, V.V., Fangohr, H. and de Groot, P.A.J. (2003) Symmetry locking and commensurate vortex domain formation in periodic pinning arrays. Physical Review Letters, 90, (23), 237001-[4pp]. (doi:10.1103/PhysRevLett.90.237001).
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The spontaneous formation of domains of commensurate vortex patterns near rational fractional matching fields of a periodic pinning array has been investigated with high resolution scanning Hall probe microscopy. We show that domain formation is promoted due to the efficient incorporation of mismatched excess vortices and vacancies at the corners of domain walls, which outweighs the energetic cost of creating them. Molecular dynamics simulations with a generic pinning potential
reveal that domains are formed only when vortex-vortex interactions are long range.
|Subjects:||T Technology > T Technology (General)
Q Science > QC Physics
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences
University Structure - Pre August 2011 > School of Physics and Astronomy > Quantum, Light and Matter
|Date Deposited:||24 Mar 2006|
|Last Modified:||28 Mar 2014 15:25|
Funded by: EPSRC (GR/S13200/01)
UNSPECIFIED to UNSPECIFIED
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