title: Revisiting the Local Structure in Ge-Sb-Te based Chalcogenide Superlattices.
abstract: The technological success of phase-change materials in the field of data storage and functional systems stems from their distinctive electronic and structural peculiarities on the nanoscale. Recently, superlattice structures have been demonstrated to dramatically improve the optical and electrical performances of these chalcogenide based phase-change materials. In this perspective, unravelling the atomistic structure that originates the improvements in switching time and switching energy is paramount in order to design nanoscale structures with even enhanced functional properties. This study reveals a high- resolution atomistic insight of the [GeTe/Sb2Te3] interfacial structure by means of Extended X-Ray Absorption Fine Structure spectroscopy and Transmission Electron Microscopy. Based on our results we propose a consistent novel structure for this kind of chalcogenide superlattices.
authors.affiliation: Università degli Studi di Trieste, Via A. Valerio 2, 34127, Trieste, Italy.|Elettra-Sincrotrone Trieste S.C.p.A. Strada Statale 14-km 163.5 in AREA Science Park 34149, Basovizza, Trieste, Italy.
authors.forename: Barbara
authors.initials: B
authors.lastname: Casarin
authors.affiliation: Elettra-Sincrotrone Trieste S.C.p.A. Strada Statale 14-km 163.5 in AREA Science Park 34149, Basovizza, Trieste, Italy.
authors.forename: Antonio
authors.initials: A
authors.lastname: Caretta
authors.affiliation: Zernike Institute for Advanced Materials, University of Groningen, Groningen 9747, AG, The Netherlands.
authors.forename: Jamo
authors.initials: J
authors.lastname: Momand
authors.affiliation: Zernike Institute for Advanced Materials, University of Groningen, Groningen 9747, AG, The Netherlands.
authors.forename: Bart J
authors.initials: BJ
authors.lastname: Kooi
authors.affiliation: Department of Applied Physics, Eindhoven University of Technology, P. O. Box 513 5600, MB Eindhoven, The Netherlands.
authors.forename: Marcel A
authors.initials: MA
authors.lastname: Verheijen
authors.affiliation: Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7 10117, Berlin, Germany.
authors.forename: Valeria
authors.initials: V
authors.lastname: Bragaglia
authors.affiliation: Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7 10117, Berlin, Germany.
authors.forename: Raffaella
authors.initials: R
authors.lastname: Calarco
authors.affiliation: Russian Academy of Sciences, Institute of Microelectronics Technology and High Purity Materials, Moscow, Russia.
authors.forename: Marina
authors.initials: M
authors.lastname: Chukalina
authors.affiliation: Engineering Department, Cambridge University, Cambridge CB2 1PZ, UK.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Yu
authors.affiliation: Engineering Department, Cambridge University, Cambridge CB2 1PZ, UK.
authors.forename: John
authors.initials: J
authors.lastname: Robertson
authors.affiliation: Institute of Physics, RWTH Aachen University, 52056, Aachen, Germany.
authors.forename: Felix R L
authors.initials: FR
authors.lastname: Lange
authors.affiliation: Institute of Physics, RWTH Aachen University, 52056, Aachen, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Wuttig
authors.affiliation: Micron Semiconductor Italia S.r.l., Via C. Olivetti, 2, 20864, Agrate Brianza, MB, Italy.
authors.forename: Andrea
authors.initials: A
authors.lastname: Redaelli
authors.affiliation: Micron Semiconductor Italia S.r.l., Via C. Olivetti, 2, 20864, Agrate Brianza, MB, Italy.
authors.forename: Enrico
authors.initials: E
authors.lastname: Varesi
authors.affiliation: Università degli Studi di Trieste, Via A. Valerio 2, 34127, Trieste, Italy.|Elettra-Sincrotrone Trieste S.C.p.A. Strada Statale 14-km 163.5 in AREA Science Park 34149, Basovizza, Trieste, Italy.|International Faculty, University of Cologne, 50937 Cologne, Germany.
authors.forename: Fulvio
authors.initials: F
authors.lastname: Parmigiani
authors.affiliation: Elettra-Sincrotrone Trieste S.C.p.A. Strada Statale 14-km 163.5 in AREA Science Park 34149, Basovizza, Trieste, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Malvestuto