  We report on an angle resolved photoemission (ARPES) study of bulk
electron-doped perovskite iridate, (Sr1-xLax)3Ir2O7. Fermi surface pockets are
observed with a total electron count in keeping with that expected from La
substitution. Depending on the energy and polarization of the incident photons,
these pockets show up in the form of disconnected "Fermi arcs", reminiscent of
those reported recently in surface electron-doped Sr2IrO4. Our observed
spectral variation is consistent with the coexistence of an electronic
supermodulation with structural distortion in the system.
