title: Toward structural/chemical cotailoring of phase-change Ge-Sb-Te in a transmission electron microscope.
abstract: Ge2Sb2Te5, as the prototype material for phase-change memory, can be transformed from amorphous phase into nanoscale rocksalt-type GeTe provided with an electron irradiation assisted by heating to 520°C in a 1250 kV transmission electron microscope. This sheds a new light into structural and chemical cotailoring of materials through coupling of thermal and electrical fields.
authors.affiliation: Department of Materials Science, Key Laboratory of Mobile Materials MOE, State Key Laboratory of Superhard Materials, Jilin University, Changchun, China; Computational and Analytical Science Center, Samsung Advanced Institute of Technology, Yongin, South Korea.
authors.forename: W
authors.initials: W
authors.lastname: Zhang
authors.forename: J-G
authors.initials: JG
authors.lastname: Kim
authors.forename: W T
authors.initials: WT
authors.lastname: Zheng
authors.forename: X Q
authors.initials: XQ
authors.lastname: Cui
authors.forename: Y-J
authors.initials: YJ
authors.lastname: Kim
authors.forename: S A
authors.initials: SA
authors.lastname: Song
keywords: Amorphous Ge-Sb-Te; HRTEM and image simulation; electron microscopy; phase-change memory; rocksalt GeTe