title: Electrical Read-Out of a Single Spin Using an Exchange-Coupled Quantum Dot.
abstract: We present an original way of continuously reading-out the state of a single electronic spin. Our detection scheme is based on an exchange interaction between the electronic spin and a nearby read-out quantum dot. The coupling between the two systems results in a spin-dependent conductance through the read-out dot and establishes an all electrical and nondestructive single spin detection. With conductance variations up to 4% and read-out fidelities greater than 99.5%, this method represents an alternative to systems for which spin-to-charge conversion cannot be implemented. Using a semiclassical approach, we present an asymmetric exchange coupling model in good agreement with our experimental results.
authors.affiliation: CNRS Institut NEEL , Grenoble, F-38000, France.|Université Grenoble Alpes, Institut NEEL , Grenoble, F-38000, France.
authors.forename: Clément
authors.initials: C
authors.lastname: Godfrin
authors.affiliation: CNRS Institut NEEL , Grenoble, F-38000, France.|Université Grenoble Alpes, Institut NEEL , Grenoble, F-38000, France.
authors.forename: Stefan
authors.initials: S
authors.lastname: Thiele
authors.affiliation: CNRS Institut NEEL , Grenoble, F-38000, France.|Université Grenoble Alpes, Institut NEEL , Grenoble, F-38000, France.
authors.forename: Abdelkarim
authors.initials: A
authors.lastname: Ferhat
authors.affiliation: Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany.
authors.forename: Svetlana
authors.initials: S
authors.lastname: Klyatskaya
authors.affiliation: Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany.|Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS-Université de Strasbourg , 67034, Strasbourg, France.
authors.forename: Mario
authors.identifier: 0000-0002-7718-7016
authors.initials: M
authors.lastname: Ruben
authors.affiliation: CNRS Institut NEEL , Grenoble, F-38000, France.|Université Grenoble Alpes, Institut NEEL , Grenoble, F-38000, France.|Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Wernsdorfer
authors.affiliation: CNRS Institut NEEL , Grenoble, F-38000, France.|Université Grenoble Alpes, Institut NEEL , Grenoble, F-38000, France.|Institut Université de France, 103 Boulevard Saint-Michel, 75005, Paris, France.
authors.forename: Franck
authors.identifier: 0000-0001-7554-3841
authors.initials: F
authors.lastname: Balestro
keywords: nanospintronic; quantum dot; single-molecule magnets; single-molecule transistor; single-spin detection