Transport Characteristics of Amorphous Semiconductors in the Dilute Carrier Regime: A Variable Range Hopping Treatment

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Transport Characteristics of Amorphous Semiconductors in the Dilute Carrier Regime: A Variable Range Hopping Treatment

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/9593

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Title: Transport Characteristics of Amorphous Semiconductors in the Dilute Carrier Regime: A Variable Range Hopping Treatment
Author: Dari, Naseer Abdulhamid, 1983-
Date: 2011-01-20
2010
Publisher: University of Missouri--Kansas City.
Abstract: We survey the analytical methods which are used to find the conductivity of amorphous solids as a function of temperature, specifically the work done by N. F. Mott and Apsley et al. and we point out the problems with deriving such a relationship. We then develop a self consistent numerical system for calculating the charge occupancy factors, and apply it to a specific case of amorphous boron carbide, where positional disorder is introduced by incorporating random shifts in the positions and orientations of icosahedral clusters of boron and carbon atoms in an initially pristine rhombohedral arrangement of icosahedra. We find the transport characteristics to be most sensitive to the size of the icosahedral clusters relative to their mean separation, while it is robust with respect to disorder. In particular, the transport characteristics are only mildly affected (i.e. slightly diminished) by random displacements in the icosahedral positions, while they do not appear to be discernibly changed in the presence of even significant orientational disorder.
URI: http://hdl.handle.net/10355/9593

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  • 2010 Freely Available Theses (UMKC) [30]
    This collection contains theses submitted electronically to the School of Graduate Studies by masters degree candidates at the University of Missouri-Kansas City in 2010. The items in this collection are theses that are available to the general public.
  • Physics Electronic Theses and Dissertations (UMKC) [21]
    The items in this collection are the scholarly output of UMKC graduate students.

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