Charge transfer and local structure in thermoelectric germanium clathrates

A. E C Palmqvist, B. B. Iversen, Lars R Furenlid, G. S. Nolas, D. Bryan, S. Latturner, G. D. Stucky

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Germanium clathrates have recently received attention as potential highly efficient thermoelectric materials based on the phonon glass electron crystal (PGEC) concept. A combined EXAFS and XANES study has been performed in order to investigate the local structure and the degree of charge transfer between the guest atoms and the framework atoms. Analysis of the Sr, Ga, and Ge K-edge XANES spectra of a Sr8Ga16Ge30 clathrate reveals that the atoms are close to neutrally charged and that the degree of charge transfer is low in agreement with recent theoretical predictions and charge density distribution measurements.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium - Proceedings
PublisherMaterials Research Society
Pages51-56
Number of pages6
Volume590
StatePublished - 2000
EventThe 1999 MRS Fall Meeting - Symposium R 'Applications of Synchrotron Radiation Techniques to Materials Science V' - Boston, MA, USA
Duration: Nov 29 1999Dec 3 1999

Other

OtherThe 1999 MRS Fall Meeting - Symposium R 'Applications of Synchrotron Radiation Techniques to Materials Science V'
CityBoston, MA, USA
Period11/29/9912/3/99

Fingerprint

Germanium
Charge transfer
Atoms
Charge density
Glass
Crystals
Electrons

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Palmqvist, A. E. C., Iversen, B. B., Furenlid, L. R., Nolas, G. S., Bryan, D., Latturner, S., & Stucky, G. D. (2000). Charge transfer and local structure in thermoelectric germanium clathrates. In Materials Research Society Symposium - Proceedings (Vol. 590, pp. 51-56). Materials Research Society.

Charge transfer and local structure in thermoelectric germanium clathrates. / Palmqvist, A. E C; Iversen, B. B.; Furenlid, Lars R; Nolas, G. S.; Bryan, D.; Latturner, S.; Stucky, G. D.

Materials Research Society Symposium - Proceedings. Vol. 590 Materials Research Society, 2000. p. 51-56.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Palmqvist, AEC, Iversen, BB, Furenlid, LR, Nolas, GS, Bryan, D, Latturner, S & Stucky, GD 2000, Charge transfer and local structure in thermoelectric germanium clathrates. in Materials Research Society Symposium - Proceedings. vol. 590, Materials Research Society, pp. 51-56, The 1999 MRS Fall Meeting - Symposium R 'Applications of Synchrotron Radiation Techniques to Materials Science V', Boston, MA, USA, 11/29/99.
Palmqvist AEC, Iversen BB, Furenlid LR, Nolas GS, Bryan D, Latturner S et al. Charge transfer and local structure in thermoelectric germanium clathrates. In Materials Research Society Symposium - Proceedings. Vol. 590. Materials Research Society. 2000. p. 51-56
Palmqvist, A. E C ; Iversen, B. B. ; Furenlid, Lars R ; Nolas, G. S. ; Bryan, D. ; Latturner, S. ; Stucky, G. D. / Charge transfer and local structure in thermoelectric germanium clathrates. Materials Research Society Symposium - Proceedings. Vol. 590 Materials Research Society, 2000. pp. 51-56
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