Publication: Signatures of a two-dimensional ferromagnetic electron gas at the La_(0.7)Sr_(0.3)MnO_(3)/SrTiO_(3) interface arising from orbital reconstruction
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2014-11-26
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Calderón, M. J.
Beltrán Fínez, Juan Ignacio
Garcia Barriocanal, Javier
Sefrioui, Zouhair
García Hernández, M.
Muñoz, M. C.
Brey, L.
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WILEY-V C H VERLAG GMBH
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Abstract
The magnetoresistance of La0.7Sr0.3MnO3/SrTiO3La0.7Sr0.3MnO3/SrTiO3 superlattices with magnetic field rotating out-of-plane shows unexpected peaks for in-plane fields. Resistivity calculations with spin–orbit coupling reveal that orbital reconstruction at the manganite interface leads to a 2D ferromagnetic electron gas coupled antiparallel to the manganite “bulk”. These orbital and magnetic reconstructions are supported by X-ray linear dichroism and ab initio calculations.
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© 2014 WILEY-VCH Verlag GmbH & Co. We acknowledge funding from MINECO-Spain through grants FIS2012–33521, MAT2011–27470-C02–01, MAT2011–27470-C02–02, MAT2012–38045-C04–04 and CSD2009–00013. JGB acknowledges funding by the 'Ramon y Cajal' programme.
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