  Usually, the superconducting quantum interference device (SQUID) consists of
two Josephson junctions and the interference therein is modulated by a magnetic
flux. In this work, we propose an electrically modulated SQUID consisting of
single Josephson junction coupled by a time-reversal breaking Weyl semimetal
thin film. For a low Fermi energy, the Josephson current is only mediated by
Fermi arc surface states, and has an arbitrary ground-state phase difference
\phi0 which is directly proportional to the product of the transverse electric
field and the cross section area of the junction.For a suitable Fermi energy,
the bulk states make comparable contributions to the Josephson current with the
current-phase relation of a 0-junction. The interference between the surface
channel and the bulk channel results in an electrically modulated SQUID with
single Josephson junction, which provides an experimental proposal to identify
magnetic Weyl semimetals and may have potential applications in superconducting
quantum computation.
