title: Surface-Driven Magnetotransport in Perovskite Nanocrystals.
abstract: Unique insights into magnetotransport in 20 nm ligand-free La0.67Sr0.33MnO3perovskite nanocrystals of nearly perfect crystalline quality reveal a chemically altered 0.8 nm thick surface layer that triggers exceptionally large magnetoresistance at low temperature, independently of the spin polarization of the ferromagnetic core. This discovery shows how the nanoscale impacts magnetotransport in a material widely spread as electrode in hybrid spintronic devices.
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 11 place Marcelin Berthelot, F-75005, Paris, France.
authors.forename: Ha Le
authors.initials: HL
authors.lastname: Thi N'Goc
authors.affiliation: Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, 23 rue du Loess, BP 43, F-67034, Strasbourg, France.
authors.forename: Louis Donald Notemgnou
authors.initials: LD
authors.lastname: Mouafo
authors.affiliation: Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, 23 rue du Loess, BP 43, F-67034, Strasbourg, France.
authors.forename: Céline
authors.initials: C
authors.lastname: Etrillard
authors.affiliation: Departamento de Química Inorgánica I, Facultad de Químicas, Universidad Complutense CEI Moncloa, 28040, Madrid, Spain.
authors.forename: Almudena
authors.initials: A
authors.lastname: Torres-Pardo
authors.affiliation: Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, 23 rue du Loess, BP 43, F-67034, Strasbourg, France.
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Dayen
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 11 place Marcelin Berthelot, F-75005, Paris, France.
authors.forename: Simon
authors.initials: S
authors.lastname: Rano
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, Chimie du Solide et de l'Energie, UMR 8260, Collège de France, 11 place Marcelin Berthelot, 75231, Paris Cedex 05, France.
authors.forename: Gwenaëlle
authors.initials: G
authors.lastname: Rousse
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 11 place Marcelin Berthelot, F-75005, Paris, France.
authors.forename: Christel
authors.initials: C
authors.lastname: Laberty-Robert
authors.affiliation: Departamento de Química Inorgánica I, Facultad de Químicas, Universidad Complutense CEI Moncloa, 28040, Madrid, Spain.|Centro Nacional de Microscopía Electrónica, Universidad Complutense, 28040, Madrid, Spain.
authors.forename: Jose Gonzales
authors.initials: JG
authors.lastname: Calbet
authors.affiliation: Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, 23 rue du Loess, BP 43, F-67034, Strasbourg, France.
authors.forename: Marc
authors.initials: M
authors.lastname: Drillon
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 11 place Marcelin Berthelot, F-75005, Paris, France.
authors.forename: Clément
authors.initials: C
authors.lastname: Sanchez
authors.affiliation: Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, 23 rue du Loess, BP 43, F-67034, Strasbourg, France.
authors.forename: Bernard
authors.initials: B
authors.lastname: Doudin
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 11 place Marcelin Berthelot, F-75005, Paris, France.
authors.forename: David
authors.initials: D
authors.lastname: Portehault
keywords: magnetism; magnetoresistance; nanoparticles; perovskites; spin transport