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Nanoscale Heat Transport in Self-Organized Ge Clusters on Si(001)

Published online by Cambridge University Press:  21 February 2013

Tim Frigge ,
Annika Kalus ,
Friedrich Klasing ,
Martin Kammler ,
Anja Hanisch-Blicharski  and
Michael Horn-von Hoegen
Tim Frigge
Affiliation:
Department of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, D- 47057 Duisburg, Germany
Annika Kalus
Affiliation:
Department of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, D- 47057 Duisburg, Germany
Friedrich Klasing
Affiliation:
Department of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, D- 47057 Duisburg, Germany
Martin Kammler
Affiliation:
Department of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, D- 47057 Duisburg, Germany
Anja Hanisch-Blicharski
Affiliation:
Department of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, D- 47057 Duisburg, Germany
Michael Horn-von Hoegen
Affiliation:
Department of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, D- 47057 Duisburg, Germany
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Abstract

Ultrafast time resolved transmission electron diffraction (TED) in a reflection geometry was used to study the cooling behavior of self-organized, well defined nanoscale germanium hut and dome clusters on Si(001). The clusters were heated in a pump-probe scheme by fs-laser pulses. The resulting transient temperature rise was then determined from the drop in diffraction intensity caused by the Debye-Waller effect. From a cooling time of τ =177 ps we estimated a strongly reduced heat transfer compared with homogeneous films of equivalent thickness.

Keywords

nanostructurethermal conductivityRHEED

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Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1456: Symposium JJ – Nanoscale Thermoelectrics 2012—Materials and Transport Phenomena , 2012 , mrss12-1456-jj05-08
Copyright
Copyright © Materials Research Society 2013

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References

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