Dynamic Phase Engineering of Bendable Transition Metal Dichalcogenide Monolayers

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)2473-2481
Journal / PublicationNano Letters
Volume17
Issue number4
Early online date10 Mar 2017
StatePublished - 12 Apr 2017
Externally publishedYes

Abstract

Current interest in two-dimensional (2D) materials is driven in part by the ability to dramatically alter their optoelectronic properties through strain and phase engineering. A combination of these approaches can be applied in quasi-2D transition metal dichalcogenide (TMD) monolayers to induce displacive structural transformations between semiconducting (H) and metallic/semimetallic (T′) phases. We classify such transformations in Group VI TMDs, and formulate a multiscale, first-principles-informed modeling framework to describe evolution of microstructural domain morphologies in elastically bendable 2D monolayers. We demonstrate that morphology and mechanical response can be controlled via application of strain either uniformly or through local probes to generate functionally patterned conductive T′ domains. Such systems form dynamically programmable electromechanical 2D materials, capable of rapid local switching between domains with qualitatively different transport properties. This enables dynamic "drawing" of localized conducting regions in an otherwise semiconducting TMD monolayer, opening several interesting device-relevant functionalities such as the ability to dynamically "rewire" a device in real time.

Research Area(s)

  • 2D materials, dynamically programmable materials, multiscale modeling, phase field microelasticity, strain-induced structural transformations, transition metal dichalcogenides

Citation Format(s)

Dynamic Phase Engineering of Bendable Transition Metal Dichalcogenide Monolayers. / Berry, Joel; Zhou, Songsong; Han, Jian; Srolovitz, David J.; Haataja, Mikko P.

In: Nano Letters, Vol. 17, No. 4, 12.04.2017, p. 2473-2481.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review