Oxygen isotopic effect on the IR reflectivity spectra of a La2NiO4.14 single crystal期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

按检索

Oxygen isotopic effect on the IR reflectivity spectra of a La2NiO4.14 single crystal

Institution:	1. Centre de recherche sur les matériaux à haute température—CNRS, 1D, avenue de la Recherche Scientifique, 45071 Orléans cedex 02, France;2. Institut de chimie de la matière condensée de Bordeaux—CNRS, 87, avenue du docteur Schweitzer, 33608 Pessac cedex, France;3. Laboratoire de cristallographie—CNRS, 25, avenue des Martyrs, B.P. 166, 38042 Grenoble cedex 09, France;4. CEA-Grenoble, DSM/DRFMC/SPSMS, 17, rue des Martyrs, 38054 Grenoble cedex 09, France;1. Department of Inorganic Chemistry (Materials Chemistry), University of Vienna, Währinger Straße 42, 1090 Wien, Austria;2. Department of Mineralogy and Crystallography, University of Vienna, Althanstraße 14, 1090 Wien, Austria;3. Department of Physical Chemistry, University of Vienna, Währinger Straße 42, 1090 Wien, Austria;1. Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain;2. Graduate School of Education, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-5824, Japan;1. Instituto de Ciencias Básicas, UNCuyo 5500 - Mendoza, Argentina;2. CONICET - Instituto Balseiro, Centro Atómico Bariloche, Argentina;3. IANIGLA - CONICET, CCT Mendoza, 5500 - Mendoza, Argentina;1. Institut Charles Gerhardt Montpellier, UMR 5253, Univ. Montpellier, CNRS, ENSCM, Montpellier, France;2. Univ Lyon, UCBL, CNRS, Institute of Light and Matter, F-69622 Villeurbanne, France

Abstract:	Infrared reflectivity spectra measurements have been realised at T=300 K on the oxygen–isotope exchanged single crystals (¹⁶O and ¹⁸O) of La₂NiO_4+δ with δ=0.14. One of the main results lies on transfer of the spectral weight from the mid-infrared spectral range to the far-infrared range upon ¹⁸O substitution. This striking effect is studied in the framework of the harmonic oscillator concept by simulating the experimental data with a dielectric function model based on the generalisation of the Lyddane–Sachs–Teller relationship. It suggests that the lattice strongly influences the behaviour of the charge carriers in such 3d transition metal oxides.

Keywords:
本文献已被 ScienceDirect 等数据库收录！

设为首页 | 免责声明 | 关于勤云 | 加入收藏