Coexistence of Superconductivity and Ferromagnetism in Two Dimensions

被引：438

作者：

Dikin, D. A. ^{[1
]}

Mehta, M. ^{[1
]}

Bark, C. W. ^{[2
]}

Folkman, C. M. ^{[2
]}

Eom, C. B. ^{[2
]}

Chandrasekhar, V. ^{[1
]}

机构：

[1] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

[2] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 05期

基金：

美国国家科学基金会;

关键词：

2-DIMENSIONAL ELECTRON-GAS; SRTIO3/LAALO3; INTERFACES; THIN-FILMS; LOCALIZATION; FLUCTUATION; OXIDES;

D O I：

10.1103/PhysRevLett.107.056802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ferromagnetism is usually considered to be incompatible with conventional superconductivity, as it destroys the singlet correlations responsible for the pairing interaction. Superconductivity and ferromagnetism are known to coexist in only a few bulk rare-earth materials. Here we report evidence for their coexistence in a two-dimensional system: the interface between two bulk insulators, LaAlO3 (LAO) and SrTiO3 (STO), a system that has been studied intensively recently. Magnetoresistance, Hall, and electric-field dependence measurements suggest that there are two distinct bands of charge carriers that contribute to the interface conductivity. The sensitivity of properties of the interface to an electric field makes this a fascinating system for the study of the interplay between superconductivity and magnetism.

引用

页数：4

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