Possible realization of a chiral p -wave paired state in a two-component system

There is much interest in the realization of systems with p-wave pairing in one dimension or chiral p-wave pairing in two dimensions, because these are believed to support Majorana modes at the ends or inside vortices. We consider a two-component system of composite fermions and provide theoretical evidence that, under appropriate conditions, the screened interaction between the minority composite fermions is such as to produce an almost exact realization of a p-wave paired state described by the so-called anti-Pfaffian wave function. This state is predicted to occur at filling ν=3/8 or 13/8 in GaAs when the Zeeman energy is sufficiently small, and at ν=±3/8 or ±13/8 in single layer graphene when either the Zeeman or the valley splitting is sufficiently small.