Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2012-03-09
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
We present a combined experimental and theoretical study of the electronic structure of the intermetallic compound TiGePt by means of photoelectron spectroscopy, x-ray absorption spectroscopy and fullpotential band structure calculations. It was recently shown that TiGePt undergoes a structural phase transition by heating which is accompanied by a large volume contraction and a drastic change of physical properties, in particular a large decrease of the electrical resistivity. The present study revealed substantial differences in the electronic structure for the two TiGePt modifications, although they have the same nominal composition and show similar electron counts for particular valence band states. Our photoemission experiments and band structure calculations establish that an insulator-to-metal transition occurs with an appreciable band broadening and closing of the band gap
Ackerbauer S.-V.
Chen Chien-Tsu
Gamza M.
Gegner Jan
Grin Yu
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