Vibrational properties of Cu nanowires


Sengun Y., Durukanoglu S.

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, cilt.389, ss.2945-2950, 2010 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 389 Konu: 15
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1016/j.physa.2010.02.013
  • Dergi Adı: PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
  • Sayfa Sayıları: ss.2945-2950

Özet

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.