Charge and spin dynamics of an ordered stripe phase in La1 2/3Sr1/3NiO4 by Raman spectroscopy

被引：1

作者：

Blumberg, G ^{[1
]}

Klein, MV

Cheong, SW

机构：

[1] Univ Illinois, NSF Sci & Technol Ctr Superconduct, Urbana, IL 61801 USA

[2] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[3] Inst Chem Phys & Biophys, EE-0001 Tallinn, Estonia

[4] AT&T Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA

[5] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08855 USA

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1998年 / 59卷 / 10-12期

基金：

美国国家科学基金会;

关键词：

Raman scattering; charge and spin-ordering; stripes;

D O I：

10.1016/S0022-3697(98)00214-5

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

For La-1 2/3Sr1/3NiO4-a commensurately doped Mott-Hubbard system-charge- and spin-ordering in a stripe phase have been investigated by phononic and magnetic Raman scattering. Formation of a superlattice and an opening of a pseudo-gap in the electron-hole excitation spectra, as well as two types of double-spin excitations (within the antiferromagnetic domain and across the domain wall) are observed below the charge-ordering transition. The temperature dependence suggests that the spin ordering is driven by charge ordering and that fluctuating stripes persist above the ordering transition. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：2196 / 2198

页数：3

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