On the isotope effect in thermal conductivity of silicon

On the isotope effect in thermal conductivity of silicon

The thermal conductivity κ(T) of single crystals of silicon with two different isotopic compositions: natural and 99.983% enriched 28Si, was investigated in the temperature range from 0.5 K to 300 K. The enriched 28Si sample has very high thermal conductivity maximum of 290 W cm–1K–1 at Tmax = 26.5...

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Veröffentlicht in:Physica status solidi. C 2004-11, Vol.1 (11), p.2995-2998
Hauptverfasser: Inyushkin, A. V., Taldenkov, A. N., Gibin, A. M., Gusev, A. V., Pohl, H.-J.
Format: Artikel
Sprache:eng
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63.20.Mt
66.70.+f
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Zusammenfassung:The thermal conductivity κ(T) of single crystals of silicon with two different isotopic compositions: natural and 99.983% enriched 28Si, was investigated in the temperature range from 0.5 K to 300 K. The enriched 28Si sample has very high thermal conductivity maximum of 290 W cm–1K–1 at Tmax = 26.5 K, about 7.5 times higher relative to the conductivity of natSi with natural isotope abundance. The isotope effect decreases with temperature increase, being 10 ± 2% at room temperature. The data are discussed briefly within the Ambegaocar's theory of isotope effect. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:1610-1634
1610-1642
DOI:10.1002/pssc.200405341