TY - JOUR
KW - Thin films
KW - Light transmission
KW - Optical properties
KW - Absorption
KW - Spectroscopic ellipsometry
KW - Near-infrared
KW - Epitaxially grown
KW - Charge transfer
KW - Band gaps
KW - Absorption onset
KW - Blue-shifted
KW - Charge-transfer excitations
KW - Local symmetry
KW - Near-ultraviolet
KW - Optical transmission spectroscopy
KW - Structural strain
KW - Absorption spectroscopy
KW - Ion exchange
AU - P Chen
AU - N.J Podraza
AU - X.S Xu
AU - A Melville
AU - E Vlahos
AU - V Gopalan
AU - Ramamoorthy Ramesh
AU - D.G Schlom
AU - J.L Musfeldt
AB - Optical transmission spectroscopy and spectroscopic ellipsometry were used to extract the optical properties of an epitaxially grown quasi-tetragonal BiFeO3 thin film in the near infrared to near ultraviolet range. The absorption spectrum is overall blue shifted compared with that of rhombohedral BiFeO3, with an absorption onset near 2.25 eV, a direct 3.1 eV band gap, and charge transfer excitations that are ∼0.4 eV higher than those of the rhombohedral counterpart. We interpret these results in terms of structural strain and local symmetry breaking. © 2010 American Institute of Physics.
BT - Applied Physics Letters
DO - 10.1063/1.3364133
LA - eng
M1 - 13
N1 - cited By 121
N2 - Optical transmission spectroscopy and spectroscopic ellipsometry were used to extract the optical properties of an epitaxially grown quasi-tetragonal BiFeO3 thin film in the near infrared to near ultraviolet range. The absorption spectrum is overall blue shifted compared with that of rhombohedral BiFeO3, with an absorption onset near 2.25 eV, a direct 3.1 eV band gap, and charge transfer excitations that are ∼0.4 eV higher than those of the rhombohedral counterpart. We interpret these results in terms of structural strain and local symmetry breaking. © 2010 American Institute of Physics.
PY - 2010
T2 - Applied Physics Letters
TI - Optical properties of quasi-tetragonal BiFeO3 thin films
VL - 96
SN - 00036951
ER -