Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2004-06-16
Phys. Rev. Lett. 93, 076407 (2004)
Physics
Condensed Matter
Disordered Systems and Neural Networks
RevTeX, 4 pages, 5 low-resolution color figures (due to size restrictions); to appear in Physical Review Letters
Scientific paper
10.1103/PhysRevLett.93.076407
Based on Monte-Carlo simulations, the stable magnetization configurations of an antiferromagnet on a quasiperiodic tiling are derived theoretically. The exchange coupling is assumed to decrease exponentially with the distance between magnetic moments. It is demonstrated that the superposition of geometric frustration with the quasiperiodic ordering leads to a three-dimensional noncollinear antiferromagnetic spin structure. The structure can be divided into several ordered interpenetrating magnetic supertilings of different energy and characteristic wave vector. The number and the symmetry of subtilings depend on the quasiperiodic ordering of atoms.
Grimm Uwe
Vedmedenko Elena Y.
Wiesendanger Roland
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