  SnTe is a prototypical topological crystalline insulator, in which the
gapless surface state is protected by a crystal symmetry. The hallmark of the
topological properties in SnTe is the Dirac cones projected to the surfaces
with mirror symmetry, stemming from the band inversion near the L points of its
bulk Brillouin zone, which can be measured by angle-resolved photoemission. We
have obtained the (111) surface of SnTe film by molecular beam epitaxy on
BaF2(111) substrate. Photon-energy-dependence of in situ angle-resolved
photoemission, covering multiple Brillouin zones in the direction perpendicular
tothe (111) surface, demonstrate the projected Dirac cones at the Gamma_bar and
M_bar points of the surface Brillouinzone. In addition, we observe a
Dirac-cone-like band structure at the Gamma point of the bulk Brillouin
zone,whose Dirac energy is largely different from those at the Gamma_bar and
M_bar points.
