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Title: Modeling surface roughness scattering in metallic nanowires

Ando's model provides a rigorous quantum-mechanical framework for electron-surface roughness scattering, based on the detailed roughness structure. We apply this method to metallic nanowires and improve the model introducing surface roughness distribution functions on a finite domain with analytical expressions for the average surface roughness matrix elements. This approach is valid for any roughness size and extends beyond the commonly used Prange-Nee approximation. The resistivity scaling is obtained from the self-consistent relaxation time solution of the Boltzmann transport equation and is compared to Prange-Nee's approach and other known methods. The results show that a substantial drop in resistivity can be obtained for certain diameters by achieving a large momentum gap between Fermi level states with positive and negative momentum in the transport direction.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [3] ;  [2]
  1. KU Leuven, Institute for Theoretical Physics, Celestijnenlaan 200D, B-3001 Leuven (Belgium)
  2. (Belgium)
  3. IMEC, Kapeldreef 75, B-3001 Leuven (Belgium)
  4. (ESAT) Department, Kasteelpark Arenberg 10, B-3001 Leuven (Belgium)
Publication Date:
OSTI Identifier:
22492730
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; APPROXIMATIONS; BOLTZMANN EQUATION; COMPARATIVE EVALUATIONS; DISTRIBUTION FUNCTIONS; FERMI LEVEL; MATRIX ELEMENTS; NANOWIRES; QUANTUM MECHANICS; RELAXATION TIME; ROUGHNESS; SCATTERING; SIMULATION; SURFACES