Glass-Like Heat Conduction in Crystalline Semiconductors

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Description

The thermal conductivity and structural properties of polycrystalline and single crystal semiconductor type-1 germanium clathrates are reported. Germanium clathrates exhibit thermal conductivities that are typical of amorphous materials. This behavior occurs in spite of their well-defined crystalline structure. The authors employ temperature dependent neutron diffraction data in investigating the displacements of the caged strontium atoms in Sr{sub 8}Ga{sub 16}Ge{sub 30} and their interaction with the polyhedral cages that entrap them. Their aim is to investigate the correlation between the structural properties and the low, glass-like thermal conductivity observed in this compound.

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9 pages

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Nolas, G.S.; Cohn, J.L.; Chakoumakos, B.C. & Slack, G.A. June 13, 1999.

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Description

The thermal conductivity and structural properties of polycrystalline and single crystal semiconductor type-1 germanium clathrates are reported. Germanium clathrates exhibit thermal conductivities that are typical of amorphous materials. This behavior occurs in spite of their well-defined crystalline structure. The authors employ temperature dependent neutron diffraction data in investigating the displacements of the caged strontium atoms in Sr{sub 8}Ga{sub 16}Ge{sub 30} and their interaction with the polyhedral cages that entrap them. Their aim is to investigate the correlation between the structural properties and the low, glass-like thermal conductivity observed in this compound.

Physical Description

9 pages

Notes

OSTI as DE00771518

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  • 25th International Thermal Conditioning Conference/12th International Thermal Expansion Conference, Ann Arbor, MI (US), 06/13/1999--06/16/1999

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  • Report No.: P00-107283
  • Grant Number: AC05-00OR22725
  • Office of Scientific & Technical Information Report Number: 771518
  • Archival Resource Key: ark:/67531/metadc718891

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  • June 13, 1999

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  • Sept. 29, 2015, 5:31 a.m.

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  • Jan. 22, 2016, 11:12 a.m.

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Nolas, G.S.; Cohn, J.L.; Chakoumakos, B.C. & Slack, G.A. Glass-Like Heat Conduction in Crystalline Semiconductors, article, June 13, 1999; Tennessee. (digital.library.unt.edu/ark:/67531/metadc718891/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.