Vibrational properties of Cu nanowires


Sengun Y., Durukanoglu S.

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, vol.389, no.15, pp.2945-2950, 2010 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 389 Issue: 15
  • Publication Date: 2010
  • Doi Number: 10.1016/j.physa.2010.02.013
  • Title of Journal : PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
  • Page Numbers: pp.2945-2950

Abstract

We have calculated local vibrational density of states (LDOS) of a center atom (CA) of a rectangular Cu nanowire with the axial orientation of < 100 >, using a real space Green's function approach with force constants extracted from interaction potentials based on the embedded atom method. The LDOS of a center atom of a strained nanowire is found to exhibit quite distinctive characteristics as compared to that of a strain-free nanowire, the most striking feature of which is the existence of high frequency modes above the bulk band even for small strain of 2.5%. We further find that these high frequency modes are shifted to even higher frequencies when the nanowire is exposed to an increasing axial strain. (C) 2010 Elsevier B.V. All rights reserved.