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- W2003483230 abstract "We report measurements of the thermal conductivity of high-quality crystals of the cubic $mathrm{I}mathrm{text{ensuremath{-}}}mathrm{V}mathrm{text{ensuremath{-}}}{mathrm{VI}}_{2}$ semiconductors ${mathrm{AgSbTe}}_{2}$ and ${mathrm{AgBiSe}}_{2}$. The thermal conductivity is temperature independent from 80 to 300 K at a value of approximately $0.70text{ }text{ }mathrm{W}/mathrm{mK}$. Heat conduction is dominated by the lattice term, which we show is limited by umklapp and normal phonon-phonon scattering processes to a value that corresponds to the minimum possible, where the phonon mean free path equals the interatomic distance. Minimum thermal conductivity in cubic $mathrm{I}mathrm{text{ensuremath{-}}}mathrm{V}mathrm{text{ensuremath{-}}}{mathrm{VI}}_{2}$ semiconductors is due to an extreme anharmonicity of the lattice vibrational spectrum that gives rise to a high Gruneisen parameter and strong phonon-phonon interactions. Members of this family of compounds are therefore most promising for thermoelectric applications, particularly as $p$-type materials." @default.
- W2003483230 created "2016-06-24" @default.
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- W2003483230 date "2008-07-14" @default.
- W2003483230 modified "2023-10-09" @default.
- W2003483230 title "Intrinsically Minimal Thermal Conductivity in Cubic<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi mathvariant=normal>I</mml:mi><mml:mtext mathvariant=normal>−</mml:mtext><mml:mi mathvariant=normal>V</mml:mi><mml:mtext mathvariant=normal>−</mml:mtext><mml:msub><mml:mi>VI</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>Semiconductors" @default.
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- W2003483230 doi "https://doi.org/10.1103/physrevlett.101.035901" @default.
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