Multi-terminal transport measurements of MoS<inf>2</inf> using a van der Waals heterostructure device platform

Xu Cui, Gwan Hyoung Lee, Young Duck Kim, Ghidewon Arefe, Pinshane Y. Huang, Chul-Ho Lee, Daniel A. Chenet, Xian Zhang, Lei Wang, Fan Ye, Filippo Pizzocchero, Bjarke S. Jessen, Kenji Watanabe, Takashi Taniguchi, David A. Muller, Tony Low, Philip Kim, James Hone

Research output: Contribution to journalArticle

665 Citations (Scopus)

Abstract

Atomically thin two-dimensional semiconductors such as MoS 2 hold great promise for electrical, optical and mechanical devices and display novel physical phenomena. However, the electron mobility of mono-and few-layer MoS 2 has so far been substantially below theoretically predicted limits, which has hampered efforts to observe its intrinsic quantum transport behaviours. Potential sources of disorder and scattering include defects such as sulphur vacancies in the MoS<inf>2</inf> itself as well as extrinsic sources such as charged impurities and remote optical phonons from oxide dielectrics. To reduce extrinsic scattering, we have developed here a van der Waals heterostructure device platform where MoS 2 layers are fully encapsulated within hexagonal boron nitride and electrically contacted in a multi-terminal geometry using gate-tunable graphene electrodes. Magneto-transport measurements show dramatic improvements in performance, including a record-high Hall mobility reaching 34,000cm <sup>2</sup> V <sup>-1</sup> s <sup>-1</sup> for six-layer MoS<inf>2</inf> at low temperature, confirming that low-temperature performance in previous studies was limited by extrinsic interfacial impurities rather than bulk defects in the MoS<inf>2</inf>. We also observed Shubnikov-de Haas oscillations in high-mobility monolayer and few-layer MoS<inf>2</inf>. Modelling of potential scattering sources and quantum lifetime analysis indicate that a combination of short-range and long-range interfacial scattering limits the low-temperature mobility of MoS <inf>2</inf>.

Original languageEnglish
Pages (from-to)534-540
Number of pages7
JournalNature Nanotechnology
Volume10
Issue number6
DOIs
Publication statusPublished - 2015 Jun 6

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering
  • Materials Science(all)
  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

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  • Cite this

    Cui, X., Lee, G. H., Kim, Y. D., Arefe, G., Huang, P. Y., Lee, C-H., Chenet, D. A., Zhang, X., Wang, L., Ye, F., Pizzocchero, F., Jessen, B. S., Watanabe, K., Taniguchi, T., Muller, D. A., Low, T., Kim, P., & Hone, J. (2015). Multi-terminal transport measurements of MoS<inf>2</inf> using a van der Waals heterostructure device platform. Nature Nanotechnology, 10(6), 534-540. https://doi.org/10.1038/nnano.2015.70