---
res:
  bibo_abstract:
  - The existence of localized vibrational modes both at the positive and at the negative
    LiNbO3 (0001) surface is demonstrated by means of first-principles calculations
    and Raman spectroscopy measurements. First, the phonon modes of the crystal bulk
    and of the (0001) surface are calculated within the density functional theory.
    In a second step, the Raman spectra of LiNbO3 bulk and of the two surfaces are
    measured. The phonon modes localized at the two surfaces are found to be substantially
    different, and are also found to differ from the bulk modes. The calculated and
    measured frequencies are in agreement within the error of the method. Raman spectroscopy
    is shown to be sensitive to differences between bulk and surface and between positive
    and negative surface. It represents therefore an alternative method to determine
    the surface polarity, which does not exploit the pyroelectric or piezoelectric
    properties of the material.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: S.
      foaf_name: Sanna, S.
      foaf_surname: Sanna
  - foaf_Person:
      foaf_givenName: Gerhard
      foaf_name: Berth, Gerhard
      foaf_surname: Berth
      foaf_workInfoHomepage: http://www.librecat.org/personId=53
  - foaf_Person:
      foaf_givenName: W.
      foaf_name: Hahn, W.
      foaf_surname: Hahn
  - foaf_Person:
      foaf_givenName: A.
      foaf_name: Widhalm, A.
      foaf_surname: Widhalm
  - foaf_Person:
      foaf_givenName: Artur
      foaf_name: Zrenner, Artur
      foaf_surname: Zrenner
      foaf_workInfoHomepage: http://www.librecat.org/personId=606
    orcid: 0000-0002-5190-0944
  - foaf_Person:
      foaf_givenName: W. G.
      foaf_name: Schmidt, W. G.
      foaf_surname: Schmidt
  bibo_doi: 10.1109/tuffc.2011.2012
  bibo_issue: '9'
  bibo_volume: 58
  dct_date: 2011^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/0885-3010
  dct_language: eng
  dct_publisher: Institute of Electrical and Electronics Engineers (IEEE)@
  dct_title: Vibrational properties of the LiNbO3 z-surfaces@
...