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Article Transport Study of Charge-Carrier Scattering in Monolayer WSe 2

Andrew Y. Joe ; Kateryna Pistunova ; Kristen Kaasbjerg ; Ke Wang ; Bumho Kim ; Daniel A. Rhodes ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; James Hone ; Tony Low ; Luis A. Jauregui ; Philip Kim

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Andrew Y. Joe, Kateryna Pistunova, Kristen Kaasbjerg, Ke Wang, Bumho Kim, Daniel A. Rhodes, Takashi Taniguchi, Kenji Watanabe, James Hone, Tony Low, Luis A. Jauregui, Philip Kim. Transport Study of Charge-Carrier Scattering in Monolayer WSe 2 . Physical Review Letters. 2024, 132 (5), 056303. https://doi.org/10.1103/physrevlett.132.056303

Description:

(abstract)

Employing flux-grown single crystal WSe2, we report charge carrier scattering behaviors measured in h-BN encapsulated monolayer field effect transistors. We perform quantum transport measurements across various hole densities and temperatures and observe a non-monotonic change of transport mobility μ as a function of hole density in the degenerately doped sample. This unusual behavior can be explained by energy dependent scattering amplitude of strong defects calculated using the T-matrix approximation. Utilizing long mean-free path (>500 nm), we demonstrate the high quality of our electronic devices by showing quantized conductance steps from an electrostatically defined quantum point contact. Our results show the potential for creating ultra-high quality quantum optoelectronic devices based on atomically thin semiconductors.

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Keyword: WSe2 single crystal, Quantum transport, Quantum point contact

Date published: 2024-01-30

Publisher: American Physical Society (APS)

Journal:

  • Physical Review Letters (ISSN: 10797114) vol. 132 issue. 5 056303

Funding:

  • Army Research Office
  • Core Research for Evolutional Science and Technology JPMJCR15F3
  • Japan Science and Technology Agency
  • Multidisciplinary University Research Initiative
  • Samsung
  • Horizon 2020 Framework Programme
  • HORIZON EUROPE Marie Sklodowska-Curie Actions 713683
  • Ministry of Education, Culture, Sports, Science and Technology JPMXP0112101001
  • Japan Society for the Promotion of Science 312 JP20H00354

Manuscript type: Author's version (Accepted manuscript)

MDR DOI:

First published URL: https://doi.org/10.1103/physrevlett.132.056303

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Updated at: 2025-08-28 08:30:32 +0900

Published on MDR: 2025-08-28 08:18:03 +0900

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