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We study the electronic structure of a Pauli paramagnetic compound,La(2)CoSi(3) using photoemission spectroscopy and ab initio band structurecalculations. Experimental valence band spectra exhibit signature of electroncorrelation induced feature around 2.5 eV - the correlation strength among Co3d electrons is estimated to be close to 3 eV. The Co 2p core level spectraalso exhibit correlation induced satellite features consistent with thescenario in the valence band spectra suggesting importance of conductionelectron 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 4frelated spectral features and thus provide a good reference to study Kondolattice systems in this class of materials. Temperature evolution of variouscore level spectra is found to be complex revealing deviations from a typicalFermi liquid behavior and emergence of distinct surface-bulk difference in theelectronic structure at finite temperature.

Electronic structure of La(2)CoSi(3) - a non-Kondo analogue of a Kondo lattice, Ce(2)CoSi(3)