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Title: Ion beam nanopatterning of III-V semiconductors: Consistency of experimental and simulation trends within a chemistry-driven theory

In this study, several proposed mechanisms and theoretical models exist concerning nanostructure evolution on III-V semiconductors (particularly GaSb) via ion beam irradiation. However, making quantitative contact between experiment on the one hand and model-parameter dependent predictions from different theories on the other is usually difficult. In this study, we take a different approach and provide an experimental investigation with a range of targets (GaSb, GaAs, GaP) and ion species (Ne, Ar, Kr, Xe) to determine new parametric trends regarding nanostructure evolution. Concurrently, atomistic simulations using binary collision approximation over the same ion/target combinations were performed to determine parametric trends on several quantities related to existing model. A comparison of experimental and numerical trends reveals that the two are broadly consistent under the assumption that instabilities are driven by chemical instability based on phase separation. Furthermore, the atomistic simulations and a survey of material thermodynamic properties suggest that a plausible microscopic mechanism for this process is an ion-enhanced mobility associated with energy deposition by collision cascades.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Purdue Univ., West Lafayette, IN (United States); Birck Nanotechnology Center, West Lafayette, IN (United States); Drexel Univ., Philadelphia, PA (United States)
  2. Southern Methodist Univ., Dallas, TX (United States)
  3. Boston Univ., Boston, MA (United States)
  4. Purdue Univ., West Lafayette, IN (United States)
  5. Purdue Univ., West Lafayette, IN (United States); Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
Publication Date:
OSTI Identifier:
1240127
Grant/Contract Number:
AC02-98CH10886
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
materials science; nanoscale materials