Physics – Condensed Matter – Statistical Mechanics
Scientific paper
1996-09-25
Phys. Rev. Lett. 78 (1997) 1090-1093
Physics
Condensed Matter
Statistical Mechanics
Final version that appeared in PRL, some minor stylistic changes and one corrected formula; 4 pp., twocolumn, REVTeX, 3 eps fi
Scientific paper
10.1103/PhysRevLett.78.1090
The surface critical behavior of semi-infinite (a) binary alloys with a continuous order-disorder transition and (b) Ising antiferromagnets in the presence of a magnetic field is considered. In contrast to ferromagnets, the surface universality class of these systems depends on the orientation of the surface with respect to the crystal axes. There is ordinary and extraordinary surface critical behavior for orientations that preserve and break the two-sublattice symmetry, respectively. This is confirmed by transfer-matrix calculations for the two-dimensional antiferromagnet and other evidence.
Burkhardt Theodore W.
Diehl H. W.
Drewitz Anja
Leidl Reinhard
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