Glass-Like Heat Conduction in High-Mobility Crystalline Semiconductors

Preprint

23 December 1998

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9812387

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.

Keywords

THERMAL CONDUCTIVITY
MOBILITY CRYSTALLINE
CRYSTAL STRUCTURE
ELECTRON MOBILITY
SEMICONDUCTORS
GLASS LIKE
LIKE HEAT

All Related Versions

Version 1, 1998-12-23, ArXiv
Published version: Physical Review Letters, 82 (4), 779.

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