Reference : Highly Confined Spin-Polarized Two-Dimensional Electron Gas in SrTiO3/SrRuO3 Superlattices
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/114792
Highly Confined Spin-Polarized Two-Dimensional Electron Gas in SrTiO3/SrRuO3 Superlattices
English
Verissimo-Alves, M. [> >]
Garcia-Fernandez, P. [> >]
Bilc, Daniel mailto [Université de Liège - ULg > Département de physique > Physique théorique des matériaux >]
Ghosez, Philippe mailto [Université de Liège - ULg > Département de physique > Physique théorique des matériaux >]
Junquera, J. [> >]
2012
Physical Review Letters
American Physical Society
108
107003
Yes (verified by ORBi)
International
0031-9007
1079-7114
Ridge
NY
[en] We report first-principles characterization of the structural and electronic properties of (SrTiO3)5/(SrRuO3)1 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 µ = 2.0µB/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.
Researchers ; Professionals
http://hdl.handle.net/2268/114792
10.1103/PhysRevLett.108.107003

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