  A superconductor-semiconducting nanowire-superconductor heterostructure in
the presence of spin orbit coupling and magnetic field can support a
supercurrent even in the absence of phase difference between the
superconducting electrodes. We investigate this phenomenon, the anomalous
Josephson effect, employing a model capable of describing many bands in the
normal region. We discuss geometrical and symmetry conditions required to have
finite anomalous supercurrent and in particular we show that this phenomenon is
enhanced when the Fermi level is located close to a band opening in the normal
region.

Mesoscale and Nanoscale Physics;Superconductivity