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We present a comparative study of our valence band photoemission results onNb2Pd1.2Se5 and Nb2Pd0.95S5 superconductors which is supported by our DFT basedelectronic structure calculations. We observe that the VB spectra of both thecompounds are qualitatively similar, except slight difference in the bindingenergy position of all features between the two compounds which could be theresult of different electronegativity of Se and S atom. The calculated densityof states reveal that the VB features are mainly composed of Pd Se S hybridizedstates. The nature of DOS originating from the distinctly coordinated Pd atomsis different. Further, the involvement of the various Pd 4d and Nb 4d states incrossing of Fermi level signifies the multiband character of these compounds.In addition, we find a temperature dependent pseudogap in Nb2Pd0.95S5 which isabsent in Nb2Pd1.2Se5.

Valence band electronic structure of Nb2Pd1.2Se5 and Nb2Pd0.95S5 superconductors