Published February 15, 2011
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Reduction of lattice thermal conductivity from planar faults in the layered Zintl compound SrZnSb_2
Abstract
The layered Zintl compound SrZnSb_2 is investigated using transmission electron microscopy (TEM) to understand the low lattice thermal conductivity. The material displays out-of-phase boundaries with a spacing from 100 down to 2 nm. Density functional theory calculations confirm that the TEM-derived defect structure is energetically reasonable. The impact of these defects on phonon scattering is analyzed within the Debye–Callaway model, which reveals a significant reduction in the acoustic phonon mean free path. This enhancement in phonon scattering leads to an ~30% reduction in lattice thermal conductivity at 300 K.
Additional Information
© 2011 American Institute of Physics. Received 10 October 2010; accepted 24 December 2010; published online 24 February 2011. The authors would like to thank A. F. May of Caltech for synthesis and discussions, and A. Olsen of the University of Oslo for discussions.Attached Files
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Additional details
- Eprint ID
- 23082
- Resolver ID
- CaltechAUTHORS:20110323-152639329
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2011-03-24Created from EPrint's datestamp field
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2021-11-09Created from EPrint's last_modified field