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Electronic structures of UTSn (T=Ni, Pd) using photoemission spectroscopy

J. -S. Kang·S. C. Wi·J. H. Kim·K. A. McEwen·C. G. Olson·J. H. Shim·B. I. Min
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Abstract

The electronic structures of the localized $5f$ systems UTSn (T=Ni, Pd) have been investigated using photoemission spectroscopy (PES). The extracted U $5f$ PES spectra of UTSn (T=Ni, Pd) exhibit a broad peak centered at $\sim 0.3$ eV below $\rm E_F$ with rather small spectral weight near $\rm E_F$ (N$_f$($\rm E_F$)). The small N$_f$($\rm E_F$) in UTSn is found to be correlated with the T $d$ PES spectra that have a very low density of states (DOS) near $\rm E_F$. The high-resolution PES spectra for UTSn provide the V-shaped reduced metallic DOS near $\rm E_F$ but do not reveal any appreciable changes in their electronic structures across the magnetic phase transitions. A possible origin for the reduced N$_f$($\rm E_F$) in UTSn is ascribed to the hybridization to the very low T $d$ DOS at $\rm E_F$. Comparison of the measured PES spectra to the LSDA+$U$ band structure calculation reveals a reasonably good agreement for UPdSn, but not so for UNiSn.

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J. -S. Kang, S. C. Wi, J. H. Kim, K. A. McEwen, C. G. Olson, J. H. Shim, B. I. Min. 2003-07-22. Electronic structures of UTSn (T=Ni, Pd) using photoemission spectroscopy. https://arxiv.org/abs/cond-mat/0307523

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