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Highly Confined Spin-Polarized Two-Dimensional Electron Gas in SrTiO3/SrRuO3 Superlattices

Abstract: We report first-principles characterization of the structural and electronic properties of ðSrTiO3Þ5=ðSrRuO3Þ1 superlattices. We show that the system exhibits a spin-polarized two-dimensional electron gas, extremely confined to the 4d orbitals of Ru in the SrRuO3 layer. Every interface in the superlattice behaves as a minority-spin half-metal ferromagnet, with a magnetic moment of  ¼ 2:0B=SrRuO3 unit. The shape of the electronic density of states, half-metallicity, and magnetism are explained in terms of a simplified tight-binding model, considering only the t2g orbitals plus (i) the bidimensionality of the system and (ii) strong electron correlations.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Verissimo-Alves M., García-Fernández P., Bilc D.I., Ghosez P., Junquera J.,

 Fuente: Physical Review Letters (2012) Volume 108, Issue 10, article number 107003

Editorial: American Physical Society

 Fecha de publicación: 08/03/2012

Nº de páginas: 5

Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.108.107003

ISSN: 0031-9007,1079-7114

Proyecto español: FIS2009-12721-C04-02

Proyecto europeo: info:eu-repo/grantAgreement/EC/FP7/228989/EU/Engineering Exotic Phenomena at Oxide Interfaces/OXIDES/

Url de la publicación: https://doi.org/10.1103/PhysRevLett.108.107003

Autores/as

MARCOS VERISSIMO ALVES

BILC, DANIEL I.

GHOSEZ, PHILIPPE