Eur. Phys. J. B 35, 349-355 (2003)
https://doi.org/10.1140/epjb/e2003-00287-y

Electronic structure and photoemission studies on Kondo semimetal U₂Ru₂Sn

¹ A. Chełkowski Institute of Physics, Silesian University, ul. Uniwersytecka 4, 40-007 Katowice, Poland
² Institute of Molecular Physics, Polish Academy of Sciences, ul. M. Smoluchowskiego 17, 60-179 Poznań, Poland
³ W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PO Box 1410, 50-950 Wrocław, Poland

Corresponding author: ^a jmorkows@ifmpan.poznan.pl

Received: 6 November 2002
Revised: 20 May 2003
Published online: 15 October 2003

Abstract

Electronic structure is studied of the compound U₂Ru₂Sn showing Kondo type anomalies. The X-ray photoemission spectrum (XPS) on a single crystal was measured and the crystal structure refinement was done. The electronic band structure was calculated by the tight-binding linear muffin-tin orbital method in the atomic sphere approximation, with non-local corrections to the exchange-correlation potential and spin-orbit effects included. The XPS valence band is well reproduced by the calculated one. Calculations suggest metallic character of U₂Ru₂Sn and give the electronic specific heat coefficient by a factor 1.4 larger than the experimental value reported in literature.