title: Optical interband transitions in [111] poled relaxor-based ferroelectric 0.24Pb(In1/2Nb1/2)O3-(0.76 -x)Pb(Mg1/3Nb2/3)O3-xPbTiO3single crystal.
abstract: Optical transmission spectra of single crystal 0.24Pb(In1/2Nb1/2)O3-(0.76 -x)Pb(Mg1/3Nb2/3)O3-xPbTiO3(x= 0.27, 0.33) were measured in the pseudo-cubic crystallographic directions [111] and [112̄]. Ferroelectric domain structures were observed in order to explain the difference of transmittance for the two composition crystals. Wavelength dependence of the absorption coefficients was measured and the optical energy band gaps were calculated for both direct and indirect transitions, which areEgd= 3.09-3.18 eV andEgi= 2.89-2.96 eV, respectively, and the phonon energy isEp= 0.07-0.08 eV. The transmission spectra were explained by the refractive indices and extinction coefficients measured by spectroscopic ellipsometry.
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Fengmin
authors.initials: F
authors.lastname: Wu
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Yang
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Enwei
authors.initials: E
authors.lastname: Sun
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Zhu
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Yongqi
authors.initials: Y
authors.lastname: Yin
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Yanbo
authors.initials: Y
authors.lastname: Pei
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Wenlong
authors.initials: W
authors.lastname: Yang
authors.affiliation: Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Wenwu
authors.initials: W
authors.lastname: Cao