Site-specific electrical contacts with the two-dimensional materials

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

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Author(s)

  • Lok-Wing Wong
  • Fangyuan Zheng
  • Jiong Zhao
  • Qingming Deng

Detail(s)

Original languageEnglish
Article number3982
Journal / PublicationNature Communications
Volume11
Online published7 Aug 2020
Publication statusPublished - 2020

Link(s)

Abstract

Electrical contact is an essential issue for all devices. Although the contacts of the emergent two-dimensional materials have been extensively investigated, it is still challenging to produce excellent contacts. The face and edge type contacts have been applied previously, however a comparative study on the site-specific contact performances is lacking. Here we report an in situ transmission electron microscopy study on the contact properties with a series of 2D materials. By manipulating the contact configurations in real time, it is confirmed that, for 2D semiconductors the vdW type face contacts exhibit superior conductivity compared with the non-vdW type contacts. The direct quantum tunneling across the vdW bonded interfaces are virtually more favorable than the Fowler–Nordheim tunneling across chemically bonded interfaces for contacts. Meanwhile, remarkable area, thickness, geometry, and defect site dependences are revealed. Our work sheds light on the significance of contact engineering for 2D materials in future applications. 

Research Area(s)

Citation Format(s)

Site-specific electrical contacts with the two-dimensional materials. / Wong, Lok-Wing; Huang, Lingli; Zheng, Fangyuan; Thi, Quoc Huy; Zhao, Jiong; Deng, Qingming; Ly, Thuc Hue.

In: Nature Communications, Vol. 11, 3982, 2020.

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

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