Direct observation of a narrow band near the gap edge of FeSi

Direct observation of a narrow band near the gap edge of FeSi

We report a high-resolution angle-resolved photoemission investigation of FeSi. The high angle and energy resolutions enable us to identify a band with spectacularly sharp features near the valence-band edge. This band shows very small dispersion but remarkable temperature dependence. The small disp...

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Bibliographic Details
Published in:Physical review. B, Condensed matter Vol. 52; no. 24; pp. 16981 - R16984
Main Authors: Park, C, Shen, Z, Loeser, AG, Dessau, DS, Mandrus, DG, Migliori, A, Sarrao, J, Fisk, Z
Format: Journal Article
Language:English
Published: United States 15-12-1995
Online Access:Get full text
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Summary:We report a high-resolution angle-resolved photoemission investigation of FeSi. The high angle and energy resolutions enable us to identify a band with spectacularly sharp features near the valence-band edge. This band shows very small dispersion but remarkable temperature dependence. The small dispersion constitutes a direct observation of a narrow band in FeSi. This finding supports a theoretical picture involving two narrow bands at the edges of a narrow gap, to account for the unusual temperature dependence of the magnetic susceptibility that makes FeSi a fascinating material.
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ISSN:0163-1829
1095-3795
DOI:10.1103/physrevb.52.r16981