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Quantifying the critical thickness of electron hybridization in spintronics materials

Pincelli, T ; Lollobrigida, V ; Borgatti, F ; Regoutz, A ; Gobaut, B ; Schlueter, C ; Lee, T-L ; Payne, D J ; Oura, M ; Tamasaku, K ; Petrov, A Y ; Graziosi, P ; Granozio, F Miletto ; Cavallini, M ; Vinai, G ; Ciprian, R ; Back, C H ; Rossi, G ; Taguchi, M ; Daimon, H ; van der Laan, G ; Panaccione, G

Nature communications, 2017-07, Vol.8 (1), p.16051-16051, Article 16051 [Periódico revisado por pares]

England: Nature Publishing Group

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Quantifying the critical thickness of electron hybridization in spintronics materials
Autor: Pincelli, T ; Lollobrigida, V ; Borgatti, F ; Regoutz, A ; Gobaut, B ; Schlueter, C ; Lee, T-L ; Payne, D J ; Oura, M ; Tamasaku, K ; Petrov, A Y ; Graziosi, P ; Granozio, F Miletto ; Cavallini, M ; Vinai, G ; Ciprian, R ; Back, C H ; Rossi, G ; Taguchi, M ; Daimon, H ; van der Laan, G ; Panaccione, G
Assuntos: Doping ; Electron orbitals ; Ferromagnetism ; Hybridization ; Magnetic properties ; Manganese ; Spintronics
É parte de: Nature communications, 2017-07, Vol.8 (1), p.16051-16051, Article 16051
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
These authors contributed equally to this work.
Descrição: In the rapidly growing field of spintronics, simultaneous control of electronic and magnetic properties is essential, and the perspective of building novel phases is directly linked to the control of tuning parameters, for example, thickness and doping. Looking at the relevant effects in interface-driven spintronics, the reduced symmetry at a surface and interface corresponds to a severe modification of the overlap of electron orbitals, that is, to a change of electron hybridization. Here we report a chemically and magnetically sensitive depth-dependent analysis of two paradigmatic systems, namely La Sr MnO and (Ga,Mn)As. Supported by cluster calculations, we find a crossover between surface and bulk in the electron hybridization/correlation and we identify a spectroscopic fingerprint of bulk metallic character and ferromagnetism versus depth. The critical thickness and the gradient of hybridization are measured, setting an intrinsic limit of 3 and 10 unit cells from the surface, respectively, for (Ga,Mn)As and La Sr MnO , for fully restoring bulk properties.
Editor: England: Nature Publishing Group
Idioma: Inglês

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Quantifying the critical thickness of electron hybridization in spintronics materials

England: Nature Publishing Group

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