A non-Abelian fractional quantum Hall state at $3\mathrm{/}7$ filled Landau level

We consider a non-Abelian candidate state at filling factor $\nu =3\mathrm{/}7$ state belonging to the parton family. We find that, in the second Landau level of GaAs (i.e. at filling factor $\nu =2+3\mathrm{/}7$), this state is energetically superior to the standard Jain composite-fermion state and also provides a very good representation of the ground state found in exact diagonalization studies of finite systems. This leads us to predict that \emph{if} a fractional quantum Hall effect is observed at $\nu =3\mathrm{/}7$ in the second Landau level, it is likely to be described by this new non-Abelian state. We enumerate experimentally measurable properties that can verify the topological structure of this state.