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28 March 2024
 
  » pubmed » pmid11019174

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Pseudogap formation in the intermetallic compounds (Fe1-xVx)3Al
H Okamura ; J Kawahara ; T Nanba ; S Kimura ; K Soda ; U Mizutani ; Y Nishino ; M Kato ; I Shimoyama ; H Miura ; K Fukui ; K Nakagawa ; H Nakagawa ; T Kinoshita ;
Date 17 Apr 2000
Journal Phys Rev Lett, 84 (16), 3674-7
AbstractOptical conductivity data of the intermetallic compounds (Fe1-xVx)3Al ( 0</=x</=0.33) reveal that their density of states around the Fermi energy ( E(F)) is strongly reduced as x is increased. In particular, Fe2VAl ( x = 0.33) has a deep, well-developed pseudogap of 0.1-0.2 eV at E(F) and a small density ( approximately 5x10(20) cm(-3)) of carriers, which is highly unusual for intermetallic compounds. It is shown that the pseudogap results from the band structure of Fe2VAl, rather than from temperature-dependent correlation effects. Based on the present results, we propose a simple model that consistently explains both the semiconductorlike transport and the metallic photoemission results previously observed for Fe2VAl.
Source PubMed, pmid11019174
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