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Kwon, Soon-Yong
Frontier, Innovative Nanomaterials & Devices (FIND) Lab
Research Interests
  • Semiconductor Epitaxy, thin film technology & surface/ interface Science

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Antiphase Boundaries as Faceted Metallic Wires in 2D Transition Metal Dichalcogenides

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Title
Antiphase Boundaries as Faceted Metallic Wires in 2D Transition Metal Dichalcogenides
Author
Kim, Jung HwaKim, Se-YangPark, Sung O.Jung, Gwan YeongSong, SeungukSohn, AhrumKim, Sang-WooKwak, Sang KyuKwon, Soon-YongLee, Zonghoon
Issue Date
2020-06
Publisher
WILEY
Citation
ADVANCED SCIENCE, pp.2000788
Abstract
Antiphase boundaries (APBs) in 2D transition metal dichalcogenides have attracted wide interest as 1D metallic wires embedded in a semiconducting matrix, which could be exploited in fully 2D-integrated circuits. Here, the anisotropic morphologies of APBs (i.e., linear and saw-toothed APBs) in the nanoscale are investigated. The experimental and computational results show that despite their anisotropic nanoscale morphologies, all APBs adopt a predominantly chalcogen-oriented dense structure to maintain the energetically most stable atomic configuration. Moreover, the effect of the nanoscale morphology of an APB on electron transport from two-probe field effect transistor measurements is investigated. A saw-toothed APB has a considerably lower electron mobility than a linear APB, indicating that kinks between facets are the main factors of scattering. The observations contribute to the systematical understanding of the faceted APBs and its impact on electrical transport behavior and it could potentially extend the applications of 2D materials through defect engineering to achieve the desired properties.
URI
https://scholarworks.unist.ac.kr/handle/201301/33002
URL
https://onlinelibrary.wiley.com/doi/full/10.1002/advs.202000788
DOI
10.1002/advs.202000788
ISSN
2198-3844
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