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Surface transformation and inversion domain boundaries in gallium nitride nanorods

Appl. Phys. Lett. 95, 211907 (2009); doi:10.1063/1.3268467

Published 25 November 2009

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Pan Xiao,1 Xu Wang,2 Jun Wang,2 Fujiu Ke,1,2 Min Zhou,3,4 and Yilong Bai1
1Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
2School of Physics, Beihang University, Beijing 100191, People's Republic of China
3George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0405, USA
4School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151–742, Republic of Korea
Phase transformation and subdomain structure in [0001]-oriented gallium nitride (GaN) nanorods of different sizes are studied using molecular dynamics simulations. The analysis concerns the structure of GaN nanorods at 300 K without external loading. Calculations show that a transformation from wurtzite to a tetragonal structure occurs along {01[overline 1]0} lateral surfaces, leading to the formation of a six-sided columnar inversion domain boundary (IDB) in the [0001] direction of the nanorods. This structural configuration is similar to the IDB structure observed experimentally in GaN epitaxial layers. The transformation is significantly dependent on the size of the nanorods. ©2009 American Institute of Physics
History: Received 4 October 2009; accepted 3 November 2009; published 25 November 2009
Permalink: http://link.aip.org/link/?APPLAB/95/211907/1
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KEYWORDS and PACS

Keywords
PACS
  • 61.46.Km
    Structure of nanowires and nanorods
  • 61.43.Bn
    Structural modeling of disordered solids
  • 68.35.Rh
    Phase transitions and critical phenomena (solid surfaces/interfaces)
  • 64.70.K-
    Solid-solid transitions
  • YEAR: 2009

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ISSN:
0003-6951 (print)   1077-3118 (online)
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