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 | |
| State | Published - Jan 1 1999 |
ASJC Scopus subject areas
- Physics and Astronomy(all)
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Cohn, J. L., Nolas, G. S., Fessatidis, V., Metcalf, T. H., & Slack, G. A. (1999). Glasslike heat conduction in high-mobility crystalline semiconductors. Physical Review Letters, 82(4), 779-782. https://doi.org/10.1103/PhysRevLett.82.779