Two-phonon absorption in LiF and NiO from infrared ellipsometry

被引：15

作者：

Willett-Gies, Travis I. ^{[1
]}

Nelson, Cayla M. ^{[1
]}

Abdallah, Lina S. ^{[1
]}

Zollner, Stefan ^{[1
]}

机构：

[1] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A | 2015年 / 33卷 / 06期

基金：

美国国家科学基金会;

关键词：

OPTICAL-PROPERTIES; LATTICE-DYNAMICS; DISPERSION; PHONON; MODES; ANHARMONICITY; SCATTERING; CRYSTALS; NEUTRON;

D O I：

10.1116/1.4927159

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Using Fourier-transform infrared spectroscopic ellipsometry, the infrared lattice absorption of LiF and NiO was studied in the reststrahlen region. The transverse optical (TO) and longitudinal optical phonon energies, broadenings, and amplitudes were determined. Both materials also show a weak two-phonon absorption, which modifies the shape of the reststrahlen bands. The authors did not find any evidence of a splitting of the TO phonon in NiO due to antiferromagnetic ordering and place an upper limit of 17 cm(-1) on this splitting. (C) 2015 American Vacuum Society.

引用

页数：6

共 46 条

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