  We study the electronic structure of a Pauli paramagnetic compound,
La(2)CoSi(3) using photoemission spectroscopy and ab initio band structure
calculations. Experimental valence band spectra exhibit signature of electron
correlation induced feature around 2.5 eV - the correlation strength among Co
3d electrons is estimated to be close to 3 eV. The Co 2p core level spectra
also exhibit correlation induced satellite features consistent with the
scenario in the valence band spectra suggesting importance of conduction
electron correlation in addition to the local moment in Kondo lattice systems.
The La(2)CoSi(3) valence band spectra could be utilized to extract Ce 4f
related spectral features and thus provide a good reference to study Kondo
lattice systems in this class of materials. Temperature evolution of various
core level spectra is found to be complex revealing deviations from a typical
Fermi liquid behavior and emergence of distinct surface-bulk difference in the
electronic structure at finite temperature.
