STRUCTURAL INVESTIGATION OF THE MoTe2 PHASES

V. Zenou, Nir Ophek, Sergiy Krylyuk, Albert Davydov, David Fuks, Louisa Meshi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

MoTe belongs to the class of the 2D transition metal dichalcogenides (TMDs). Electrical properties of the MoTe change as a function of the crystallographic structure. This phase has three structural polymorphs: 2H hexagonal (α) phase with semiconducting properties, 1T’ monoclinic (b) which exhibits metallic properties [1]. Third polymorph was reported to exist at low temperatures and it has orthorhombic Td structure. Thus this material has high potential to be implemented in various electronic devices including phase-change memory and logic. α and b phases are stable at room temperature. Transition between them occurs at about 900°C and depends on the cooling rate. Matter of reversibility of phase transition is under debate [2, 3, for example]. In current research structure and defects of the MoTe were studied in Transmission Electron Microscope as a function of thermal cycling and growth parameters. Structural relationships between the α and b phases will be discussed.
Original languageEnglish
Title of host publicationIsrael Materials Engineering Conference 18
StatePublished - 6 Feb 2018

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