Glasslike heat conduction in high-mobility crystalline semiconductors

J. L. Cohn; G. S. Nolas; V. Fessatidis; T. H. Metcalf; G. A. Slack

doi:10.1103/PhysRevLett.82.779

Glasslike heat conduction in high-mobility crystalline semiconductors

J. L. Cohn, G. S. Nolas, V. Fessatidis, T. H. Metcalf, G. A. Slack

Physics

Research output: Contribution to journal › Article › peer-review

589 Scopus citations

Abstract

The thermal conductivity of polycrystalline semiconductors with type-I clathrate hydrate crystal structure is reported. Ge clathrates (doped with Sr and/or Eu) exhibit lattice thermal conductivities typical of amorphous materials. Remarkably, this behavior occurs in spite of the well-defined crystalline structure and relatively high electron mobility (˜100cm²/Vs). The dynamics of dopant ions and their interaction with the polyhedral cages of the structure are a likely source of the strong phonon scattering.

Original language	English (US)
Pages (from-to)	779-782
Number of pages	4
Journal	Physical Review Letters
Volume	82
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.82.779
State	Published - 1999

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.82.779

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abstract = "The thermal conductivity of polycrystalline semiconductors with type-I clathrate hydrate crystal structure is reported. Ge clathrates (doped with Sr and/or Eu) exhibit lattice thermal conductivities typical of amorphous materials. Remarkably, this behavior occurs in spite of the well-defined crystalline structure and relatively high electron mobility (˜100cm2/Vs). The dynamics of dopant ions and their interaction with the polyhedral cages of the structure are a likely source of the strong phonon scattering.",

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AU - Cohn, J. L.

AU - Nolas, G. S.

AU - Fessatidis, V.

AU - Metcalf, T. H.

AU - Slack, G. A.

PY - 1999

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N2 - The thermal conductivity of polycrystalline semiconductors with type-I clathrate hydrate crystal structure is reported. Ge clathrates (doped with Sr and/or Eu) exhibit lattice thermal conductivities typical of amorphous materials. Remarkably, this behavior occurs in spite of the well-defined crystalline structure and relatively high electron mobility (˜100cm2/Vs). The dynamics of dopant ions and their interaction with the polyhedral cages of the structure are a likely source of the strong phonon scattering.

AB - The thermal conductivity of polycrystalline semiconductors with type-I clathrate hydrate crystal structure is reported. Ge clathrates (doped with Sr and/or Eu) exhibit lattice thermal conductivities typical of amorphous materials. Remarkably, this behavior occurs in spite of the well-defined crystalline structure and relatively high electron mobility (˜100cm2/Vs). The dynamics of dopant ions and their interaction with the polyhedral cages of the structure are a likely source of the strong phonon scattering.

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Glasslike heat conduction in high-mobility crystalline semiconductors

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