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Glass-Like Heat Conduction in High-Mobility Crystalline Semiconductors | | J. L. Cohn
; G. S. Nolas
; V. Fessatidis
; T. H. Metcalf
; G. A. Slack
; | | Date: |
23 Dec 1998 | | Subject: | Materials Science; Disordered Systems and Neural Networks | cond-mat.mtrl-sci cond-mat.dis-nn | | 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 ($sim 100 cm^2/Vs$). The dynamics of dopant ions and their interaction with the polyhedral cages of the structure are a likely source of the strong phonon scattering. | | Source: | arXiv, cond-mat/9812387 | | Services: | Forum | Review | PDF | Favorites | |
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