Charge and spin dynamics of an ordered stripe phase in La12/3Sr1/3NiO4 investigated by Raman spectroscopy

被引：77

作者：

Blumberg, G ^{[1
]}

Klein, MV

Cheong, SW

机构：

[1] Univ Illinois, NSF, Sci & Technol Ctr Supercond, 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：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.80.564

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Fur La12/3Sr1/3NiO4, a commensurately doped Mott-Hubbard system, charge and spin ordering in a stripe has been investigated by phonon and magnetic Raman scattering. Formation of a superlattice and an opening of a pseudogap 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.

引用

页码：564 / 567

页数：4

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