The zero-gap Ce3Au3Sb4−x system: a transport, thermodynamic and optical study

We report our resistivity, thermoelectric power and optical investigations on the Ce3Au3Sb4−x narrow-gap insulator. The resistivity for x=0.12 and 0.17 is characterized by a semiconducting-like behaviour at low temperatures, which contrasts with the metallic-like temperature dependence of the thermo...

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Bibliographic Details
Published inSolid state communications Vol. 108; no. 7; pp. 463 - 467
Main Authors Broderick, S., Vescoli, V., Buschinger, B., Guth, W., Trovarelli, O., Weiden, M., Degiorgi, L., Geibel, C., Steglich, F.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 16.10.1998
Elsevier
Subjects
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic conduction in metals and alloys
Electronic transport in condensed matter
Exact sciences and technology
Metals. Metallurgy
Physics
Electrical conductivity
Gold alloys
Antimony alloys
Cerium alloys
Ternary alloys
Experimental study
Optical conductivity
Quantity ratio
Reflection spectrum
Thermoelectric power
Rare earth alloys
Kondo lattice
Transition element alloys
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Summary:We report our resistivity, thermoelectric power and optical investigations on the Ce3Au3Sb4−x narrow-gap insulator. The resistivity for x=0.12 and 0.17 is characterized by a semiconducting-like behaviour at low temperatures, which contrasts with the metallic-like temperature dependence of the thermoelectric power. This apparent contradiction can be reconciled by a so-called “zero-gap” scenario, as supported by the optical investigation.
ISSN:0038-1098
1879-2766
DOI:10.1016/S0038-1098(98)00375-5