Optical interband transitions in relaxor-based ferroelectric 0.93Pb(Zn1/3Nb2/3)O3-0.07PbTiO3 single crystal

被引：26

作者：

Sun, Enwei ^{[1
,3
]}

Zhang, Rui ^{[1
]}

Wang, Zhu ^{[1
]}

Xu, Dapeng ^{[2
]}

Li, Liang ^{[2
]}

Cao, Wenwu ^{[1
,3
]}

机构：

[1] Harbin Inst Technol, Dept Phys, Harbin 150080, Peoples R China

[2] Jilin Univ, Coll Phys, Changchun 130023, Peoples R China

[3] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2010年 / 107卷 / 11期

关键词：

absorption coefficients; energy gap; ferroelectric materials; ferroelectric transitions; lead compounds; light transmission; phonons; Raman spectra; ORIENTATION DEPENDENCE; TEMPERATURE;

D O I：

10.1063/1.3446293

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The optical transmission spectrum of [111](c) poled relaxor-based ferroelectric single crystal 0.93Pb(Zn1/3Nb2/3)O-3-0.07PbTiO(3) (PZN-0.07PT) was measured in the range of ultraviolet to near infrared. The optical absorption edge has been determined and the wavelength dependence of the absorption coefficient was calculated. The direct energy gap E-gd=3.144 eV, indirect energy gap E-gi=2.915 eV, and phonon energy E-p=0.097 eV (or 782 cm(-1)) were determined based on the theory of band to band transitions. It was also confirmed by Raman spectra that the indirect transition for the [111](c) poled PZN-0.07PT single crystal is mainly due to the contribution of 780 cm(-1) phonon corresponding to the Nb-O-Zn bond stretching mode.

引用

页数：3

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