Magnetic ordering in a normal Fermi liquid at absolute zero

Abstract

We investigate the magnetic-ordering phase transition in a model of a strongly interacting (normal) Fermi liquid at zero temperature. Our system consists of spin-½ fermions which interact with a Lennard-Jones potential. The ground-state thermodynamic properties are obtained by a variational calculation which is carried through in the quantum theorem of corresponding states picture. We show that magnetic ordering represents the balance between the kinetic energy and the repulsive part of the potential energy and that the attractive part of the potential energy tends to inhibit spin ordering.