Coexistence of superconductivity and ferromagnetism in two dimensions

D. A. Dikin*, M. Mehta, C. W. Bark, C. M. Folkman, C. B. Eom, V. Chandrasekhar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

347 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number056802
JournalPhysical review letters
Volume107
Issue number5
DOIs
StatePublished - Jul 25 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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