Dielectric response of (Ba,Sr)TiO3 thin films in a terahertz and IR ranges

被引：8

作者：

Komandin, G. A. ^{[1
]}

Mukhortov, V. M. ^{[2
]}

Porodinkov, O. E. ^{[1
]}

Spektor, I. E. ^{[1
]}

机构：

[1] Russian Acad Sci, Prokhorov Gen Phys Inst, Moscow 119991, Russia

[2] Russian Acad Sci, So Sci Ctr, Rostov Na Donu 344006, Russia

来源：

PHYSICS OF THE SOLID STATE | 2013年 / 55卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

BARIUM-STRONTIUM-TITANATE; OPTICAL PHONONS; SPECTRA;

D O I：

10.1134/S1063783413020133

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Dependences of the dielectric response spectra on the thickness of the films based on the (Ba,Sr)TiO3 (BST) solid solutions, which were deposited on single-crystal MgO substrates, have been analyzed. Using the Lorentz and Lyddane-Sachs-Teller models, the mutual correspondence of longitudinal optical (LO) and transverse optical (TO) phonon frequencies has established. The giant LO-TO splitting of the lowest-frequency vibration and inversion of LO and TO frequencies of other phonons in the IR spectrum of BST films has been found for the first time.

引用

页码：288 / 292

页数：5

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