SOFT-MODE STUDIES IN KTA0.93NB0.07O3 WITH USE OF THE TIME-RESOLVED 3RD-ORDER OPTICAL SUSCEPTIBILITY CHI-3

被引：24

作者：

GRENIER, P

HOUDE, D

JANDL, S

BOATNER, LA

机构：

[1] UNIV SHERBROOKE,DEPT MED NUCL & RADIOBIOL,SHERBROOKE J1K 2R1,QUEBEC,CANADA

[2] OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.47.1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Determinations of the third-order optical susceptibility have been used to investigate the dynamical properties of the A1(TO) soft-polariton mode in KTa0.93Nb0.07O3 as a function of temperature. Saturation of the soft-polariton frequency as T --> T(c) indicates an interaction with the relaxation mode and evidence is found for the presence of low-frequency excitations that significantly increase the observed damping rate. Also, with the use of the polariton dispersion and self-energy formulas, frequency and damping are compared to the TO Raman-active phonon parameters.

引用

页码：1 / 4

页数：4

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