Title: Correct Brillouin zone and electronic structure of BiPd,
Abstract: A promising route to the realization of Majorana fermions is in
non-centrosymmetric superconductors, in which spin-orbit-coupling lifts the
spin degeneracy of both bulk and surface bands. A detailed assessment of the
electronic structure is critical to evaluate their suitability for this through
establishing the topological properties of the electronic structure. This
requires correct identification of the time-reversal-invariant momenta. One
such material is BiPd, a recently rediscovered non-centrosymmetric
superconductor which can be grown in large, high-quality single crystals and
has been studied by several groups using angular resolved photoemission to
establish its surface electronic structure. Many of the published electronic
structure studies on this material are based on a reciprocal unit cell which is
not the actual Brillouin zone of the material. We show here the consequences of
this for the electronic structures and show how the inferred topological nature
of the material is affected.