  A recent paper on the insulating state of monolayer WTe2 reported the
observation of large oscillations in the conductivity that are periodic in 1/B,
resembling quantum oscillations in metals. This remarkable observation has
inspired suggestions of exotic physics such as spin-charge separation. We show
that a rather more conventional but still nontrivial explanation in terms of
gap modulation may be possible in a model of excitonic insulator subject to a
magnetic field.
