Document Detail

Probing the electronic structure at semiconductor surfaces using charge transport in nanomembranes.
MedLine Citation:
PMID:  23299889     Owner:  NLM     Status:  In-Data-Review    
The electrical properties of nanostructures are extremely sensitive to their surface condition. In very thin two-dimensional crystalline-semiconductor sheets, termed nanomembranes, the influence of the bulk is diminished, and the electrical conductance becomes exquisitely responsive to the structure of the surface and the type and density of defects there. Its understanding therefore requires a precise knowledge of the surface condition. Here we report measurements, using nanomembranes, that demonstrate direct charge transport through the π* band of the clean reconstructed Si(001) surface. We determine the charge carrier mobility in this band. These measurements, performed in ultra-high vacuum to create a truly clean surface, lay the foundation for a quantitative understanding of the role of extended or localized surface states, created by surface structure, defects or adsorbed atoms/molecules, in modifying charge transport through semiconductor nanostructures.
Weina Peng; Zlatan Aksamija; Shelley A Scott; James J Endres; Donald E Savage; Irena Knezevic; Mark A Eriksson; Max G Lagally
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Nature communications     Volume:  4     ISSN:  2041-1723     ISO Abbreviation:  Nat Commun     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-01-09     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101528555     Medline TA:  Nat Commun     Country:  England    
Other Details:
Languages:  eng     Pagination:  1339     Citation Subset:  IM    
Department of Physics, University of Wisconsin-Madison, 1150 University Avenue, Madison, Wisconsin 53706, USA.
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