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.

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页码：1 / 4

页数：4

相关论文

共 21 条

[11] DEFECTS AND CENTRAL PEAK NEAR STRUCTURAL PHASE-TRANSITIONS [J].

HALPERIN, BI ;

VARMA, CM .

PHYSICAL REVIEW B, 1976, 14 (09) :4030-4044

[12] LATTICE-DYNAMICS OF KTA1-XNBXO3 SOLID-SOLUTIONS IN THE CUBIC PHASE [J].

KUGEL, GE ;

FONTANA, MD ;

KRESS, W .

PHYSICAL REVIEW B, 1987, 35 (02) :813-820

[13] VIBRATIONAL DYNAMICS OF LIQUIDS AND SOLIDS INVESTIGATED BY PICOSECOND LIGHT-PULSES [J].

LAUBEREAU, A ;

KAISER, W .

REVIEWS OF MODERN PHYSICS, 1978, 50 (03) :607-665

[14] CRITICAL QUASIELASTIC LIGHT-SCATTERING IN KTA0.968NB0.032O3 [J].

LEE, E ;

CHASE, LL ;

BOATNER, LA .

PHYSICAL REVIEW B, 1985, 31 (03) :1438-1448

[15] RAMAN-SCATTERING STUDIES OF THE IMPURITY-INDUCED FERROELECTRIC PHASE-TRANSITION IN KTAO3-NB [J].

PRATER, RL ;

CHASE, LL ;

BOATNER, LA .

PHYSICAL REVIEW B, 1981, 23 (01) :221-231

[16]

RYTZ D, 1983, PHYS REV B, V28, P6014

[17] CRITICAL NEUTRON-SCATTERING IN SRTIO3 AND KMNF3 [J].

SHAPIRO, SM ;

SHIRANE, G ;

RISTE, T ;

AXE, JD .

PHYSICAL REVIEW B, 1972, 6 (11) :4332-&

[18] VALUES AND SIGNS OF THE 3RD ORDER SUSCEPTIBILITY COEFFICIENTS IN AN ISOTROPIC TRANSPARENT SOLID [J].

THOMAZEAU, I ;

ETCHEPARE, J ;

GRILLON, G ;

HAMONIAUX, G ;

ORSZAG, A .

OPTICS COMMUNICATIONS, 1985, 55 (06) :442-446

[19] MEASUREMENT OF FREQUENCY-DEPENDENCE OF PHONON DAMPING FUNCTION BY RAMAN SCATTERING FROM POLARITONS IN GAP [J].

USHIODA, S ;

MCMULLEN, JD .

SOLID STATE COMMUNICATIONS, 1972, 11 (01) :299-&

[20] DAMPING MECHANISM OF POLARITONS IN GAP [J].

USHIODA, S ;

MCMULLEN, JD ;

DELANEY, MJ .

PHYSICAL REVIEW B, 1973, 8 (10) :4634-4637