title: Criticality versus q in the (2+1)-dimensional Zq clock model.
abstract: Using Monte Carlo simulations we have studied the d=3 Z(q) clock model in two different representations, the phase representation and the loop-gas/dumbbell-gas representation. We find that for q> or =5 the critical exponents alpha and nu for the specific heat and the correlation length, respectively, take on values corresponding to the case q--> infinity, the XY model. Hence in terms of critical properties the limiting behavior is reached already at q=5.
authors.affiliation: Department of Physics, Norwegian University of Science and Technology, N-7491 Trondheim, Norway. Joakim.Hove@phys.ntnu.no
authors.forename: J
authors.initials: J
authors.lastname: Hove
authors.forename: A
authors.initials: A
authors.lastname: Sudbø