Observation of Fano asymmetry in Raman spectra of SrTiO3 and CaxSr1xTiO3 perovskite nanocubes Academic Article

abstract

• Bulk SrTi O3 is cubic and not expected to exhibit any first-order Raman scattering. However, nanocubes of SrTi O3 with an edge length of 8010 nm show strong first-order Raman scattering originating from the breaking of symmetry caused by frozen surface dipoles (local tetragonality) and the presence of nanoscopic polar domains (arising from incorporated impurities). Rapid polarization fluctuations within these nanoscopic ferroelectric regions interfere with a polar phonon, resulting in a Fano-like asymmetric line shape in these SrTi O3 nanocubes, as well as in Ca0.3 Sr0.7 Ti O3 nanocubes. 2006 American Institute of Physics.

authors

• Banerjee, Sarbajit

published proceedings

• Applied Physics Letters

author list (cited authors)

• Banerjee, S., Kim, D., Robinson, R. D., Herman, I. P., Mao, Y., & Wong, S. S.

citation count

• 61

complete list of authors

• Banerjee, Sarbajit||Kim, Dae-In||Robinson, Richard D||Herman, Irving P||Mao, Yuanbing||Wong, Stanislaus S

publication date

• November 2006

publisher

• AIP Publishing  Publisher

published in

• Applied Physics Letters  Journal

Digital Object Identifier (DOI)

• 10.1063/1.2400095

start page

• 223130

end page

• 223130

volume

• 89

issue

• 22

URL

• http://dx.doi.org/10.1063/1.2400095