Skip to main content
×
×
Home

The Formation of Self-Assembled Nanowire Arrays on Ge(001): a DFT Study of Pt Induced Nanowire Arrays

  • Danny Eric Paul Vanpoucke (a1) and Geert Brocks (a2)
Abstract

Nanowire (NW) arrays form spontaneously after high temperature annealing of a sub monolayer deposition of Pt on a Ge(001) surface. These NWs are a single atom wide, with a length limited only by the underlying beta-terrace to which they are uniquely connected. Using ab-initio density functional theory (DFT) calculations we study possible geometries of the NWs and substrate. Direct comparison to experiment is made via calculated scanning tunneling microscope (STM) images. Based on these images, geometries for the beta-terrace and the NWs are identified, and a formation path for the nanowires as function of increasing local Pt density is presented. We show the beta-terrace to be a dimer row surface reconstruction with a checkerboard pattern of Ge-Ge and Pt-Ge dimers. Most remarkably, comparison of calculated to experimental STM images shows the NWs to consist of germanium atoms embedded in the Pt-lined troughs of the underlying surface, contrary to what was assumed previously in experiments.

Copyright
References
Hide All
1Gürlü, O., Adam, O. A. O., Zandvliet, H. J. W. and Poelsema, B., Appl. Phys. Lett. 83, 4610 (2003).
2Oncel, N., Houselt, A. van, Huijben, J., Hallback, A. S., Gürlü, O., Zandvliet, H. J. W. and Poelsema, B., Phys. Rev. Lett. 95, 116801 (2005).
3Blöchl, P. E., Phys. Rev. B 50, 17953 (1994)
4Kresse, G. and Joubert, D., Phys. Rev. B 59, 1758 (1999)
5Kresse, G. and Hafner, J., Phys. Rev. B 47, (R)558 (1993)
6Kresse, G. and Furthmüller, J., Phys. Rev. B 54, 11169 (1996)
7Tersoff, J. and Hamann, D. R., Phys. Rev. B 31, 805 (1985)
8HIVE program, http://cmsdata.tnw.utwente.nl/̃danny/hive.html
9Zandvliet, H. J. W., Private communication.
10Fischer, M., Houselt, A. van, Kockmann, D., Poelsema, B. and Zandvliet, H. J. W., Phys. Rev. B 76, 245429 (2007)
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
  • URL: /core/journals/mrs-online-proceedings-library-archive
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed