TY - RPRT
TI - Ferromagnetic Potts model in a magnetic field: Finite lattice extrapolation of the (1+1)-dimensional Hamiltonian
AB - The (1+1)-dimensional Hamiltonian q-state ferromagnetic Potts model in an external magnetic field H is studied using finite lattice extrapolation techniques. The possible phases and their boundaries are determined from the ground state energy and the gap in the excitation energy, for arbitrary values of q and both for positive and negative field. We found that, for H positive, there is a critical value q{sub c}, where a first order transition line appears for q>q{sub c}, starting at the zero field transition point and terminating at a critical point in (h/{lambda}, H/{lambda}) plane, which separates the disordered phase and the ordered phase in the direction of H. For h negative a critical transition line separating the disordered phase and the others (q-1) ordered phases becomes first order for q>q{sub c}. (author). 12 refs, 2 figs.
AU - Bassir, A [International Centre for Theoretical Physics, Trieste (Italy)]
AU - Benyoussef, A [Laboratoire de Magnetisme et Physique des Hautes Energies, Rabat (Morocco). Dept. de Physique]
KW - 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
KW - FERROMAGNETISM
KW - HAMILTONIANS
KW - CRYSTAL LATTICES
KW - EXCITED STATES
KW - GROUND STATES
KW - MAGNETIC FIELDS
KW - PHASE DIAGRAMS
KW - TWO-DIMENSIONAL CALCULATIONS
KW - 665400
KW - QUANTUM PHYSICS ASPECTS OF CONDENSED MATTER
DO -
UR -
PB -
CY - IAEA
PY - 1994
DA - 1994-09-01
LA - English
J2 -
C1 - International Centre for Theoretical Physics (ICTP), Trieste (Italy)
C2 -
ER -