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 (∼100 cm2/V s). 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 |
| State | Published - Jan 25 1999 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Glasslike Heat Conduction in High-Mobility Crystalline Semiconductors. / Cohn, Joshua; Nolas, G. S.; Fessatidis, V.; Metcalf, T. H.; Slack, G. A.
In: Physical Review Letters, Vol. 82, No. 4, 25.01.1999, p. 779-782.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Glasslike Heat Conduction in High-Mobility Crystalline Semiconductors
AU - Cohn, Joshua
AU - Nolas, G. S.
AU - Fessatidis, V.
AU - Metcalf, T. H.
AU - Slack, G. A.
PY - 1999/1/25
Y1 - 1999/1/25
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 (∼100 cm2/V s). 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 (∼100 cm2/V s). The dynamics of dopant ions and their interaction with the polyhedral cages of the structure are a likely source of the strong phonon scattering.
UR - http://www.scopus.com/inward/record.url?scp=0033601562&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033601562&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0033601562
VL - 82
SP - 779
EP - 782
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 4
ER -