Abstract
We study the ground state vortex lattices of a kagomé array of Josephson junctions in an external magnetic field. We give a simple model that accounts for the principal dependence of ground state energy on the density of vortices, and exhibit the exact ground state configurations for a sequence of special values. A Monte Carlo simulated annealing shows that there is very little further structure. For the special case f =AB/φo = 1/2 it is known that there is an infinite degeneracy. We give a numerical technique for evaluating the zero temperature entropy.
Original language | English |
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Article number | 144502 |
Pages (from-to) | 1445021-1445026 |
Number of pages | 6 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 66 |
Issue number | 14 |
DOIs | |
State | Published - Oct 1 2002 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics