Document Detail


Electronic structure and spectroscopy of cadmium telluride quantum wires.
MedLine Citation:
PMID:  18698835     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The size-dependent electronic structure of CdTe quantum wires is determined by density functional theory using the local density approximation with band-corrected pseudopotential method. The results of the calculations are then used to assign the size-dependent absorption spectrum of colloidal CdTe quantum wires synthesized by the solution-liquid-solid mechanism. Quantitative agreement between experiment and theory is achieved. The absorption features comprise transitions involving the highest 25-30 valence-band states and lowest 15 conduction-band states. Individual transitions are not resolved; rather, the absorption features consist of clusters of transitions that are determined by the conduction-band energy-level spacings. The sequence, character, and spacing of the conduction-band states are strikingly consistent with the predictions of the simple effective-mass-approximation, particle-in-a-cylinder model. The model is used to calculate the size dependence of the electron effective mass in CdTe quantum wires.
Authors:
Jianwei Sun; William E Buhro; Lin-Wang Wang; Joshua Schrier
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Publication Detail:
Type:  Journal Article     Date:  2008-08-13
Journal Detail:
Title:  Nano letters     Volume:  8     ISSN:  1530-6984     ISO Abbreviation:  Nano Lett.     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-09-12     Completed Date:  2008-10-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088070     Medline TA:  Nano Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2913-9     Citation Subset:  -    
Affiliation:
Department of Chemistry and Center for Materials Innovation, Washington University, St. Louis, Missouri 63130-4899, USA.
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