  High quality single crystals of heavy Fermion CeCoIn5 superconductor have
been grown by flux method with a typical size of (1~2)mm x (1~2)mm x ~0.1 mm.
The single crystals are characterized by structural analysis from X-ray
diffraction and Laue diffraction, as well as compositional analysis. Magnetic
and electrical measurements on the single crystals show a sharp superconducting
transition with a transition temperature at Tc(onset) ~ 2.3 K and a transition
width of ~0.15 K. The resistivity of the CeCoIn5 crystal exhibits a hump at ~45
K which is typical of a heavy Fermion system. High resolution angle-resolved
photoemission spectroscopy (ARPES) measurements of CeCoIn5 reveal clear Fermi
surface sheets that are consistent with the band structure calculations when
assuming itinerant Ce 4f electrons at low temperature. This work provides
important information on the electronic structure of heavy Fermion CeCoIn5
superconductor. It also lays a foundation for further studies on the physical
properties and superconducting mechanism of the heavy Fermion superconductors.
