Nano Research

, Volume 5, Issue 7, pp 470–476 | Cite as

High crystal quality wurtzite-zinc blende heterostructures in metal-organic vapor phase epitaxy-grown GaAs nanowires

  • Sebastian LehmannEmail author
  • Daniel Jacobsson
  • Knut Deppert
  • Kimberly A. Dick
Research Article


We have prepared GaAs wurtzite (WZ)-zinc blende (ZB) nanowire heterostructures by Au particle-assisted metal-organic vapor phase epitaxy (MOVPE) growth. Superior crystal quality of both the transition region between WZ and ZB and of the individual segments themselves was found for WZ-ZB single heterostructures. Pure crystal phases were achieved and the ZB segments were found to be free of any stacking defects, whereas the WZ sections showed a maximum stacking fault density of 20 μm−1. The hexagonal cross-sectional wires are terminated by \(\left\{ {10\bar 10} \right\}\)-type side facets for the WZ segment and predominantly {110}-type side facets for the ZB part of the wire. A diameter increase occurred after the transition from WZ to ZB. Additionally, facets of the \(\left\{ {\bar 1\bar 1\bar 1} \right\}\)-type as well as downwards-directed overgrowth of the WZ segments were formed at the WZ to ZB transition to compensate for the observed diameter increase and facet rotation. In the case of WZ-ZB multiple heterostructures, we observed slightly higher densities of stacking faults and twin planes compared to single heterostructures.


Nanowires GaAs heterostructure polytypism metal-organic vapor phase epitaxy (MOVPE)-growth 


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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Sebastian Lehmann
    • 1
    Email author
  • Daniel Jacobsson
    • 1
  • Knut Deppert
    • 1
  • Kimberly A. Dick
    • 1
    • 2
  1. 1.Solid State PhysicsLund UniversityLundSweden
  2. 2.Polymer & Materials ChemistryLund UniversityLundSweden

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