A valley valve and electron beam splitter

Jing Li, Rui Xing Zhang, Zhenxi Yin, Jianxiao Zhang, Kenji Watanabe, Takashi Taniguchi, Chaoxing Liu, Jun Zhu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Developing alternative paradigms of electronics beyond silicon technology requires the exploration of fundamentally new physical mechanisms, such as the valley-specific phenomena in hexagonal two-dimensional materials. We realize ballistic valley Hall kink states in bilayer graphene and demonstrate gate-controlled current transmission in a four-kink router device. The operations of a waveguide, a valve, and a tunable electron beam splitter are demonstrated. The valley valve exploits the valley-momentum locking of the kink states and reaches an on/off ratio of 8 at zero magnetic field. A magnetic field enables a full-range tunable coherent beam splitter. These results pave a path to building a scalable, coherent quantum transportation network based on the kink states.

Original languageEnglish (US)
Pages (from-to)1149-1152
Number of pages4
JournalScience
Volume362
Issue number6419
DOIs
StatePublished - Dec 7 2018

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Li, J., Zhang, R. X., Yin, Z., Zhang, J., Watanabe, K., Taniguchi, T., ... Zhu, J. (2018). A valley valve and electron beam splitter. Science, 362(6419), 1149-1152. https://doi.org/10.1126/science.aao5989
Li, Jing ; Zhang, Rui Xing ; Yin, Zhenxi ; Zhang, Jianxiao ; Watanabe, Kenji ; Taniguchi, Takashi ; Liu, Chaoxing ; Zhu, Jun. / A valley valve and electron beam splitter. In: Science. 2018 ; Vol. 362, No. 6419. pp. 1149-1152.
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Li, J, Zhang, RX, Yin, Z, Zhang, J, Watanabe, K, Taniguchi, T, Liu, C & Zhu, J 2018, 'A valley valve and electron beam splitter', Science, vol. 362, no. 6419, pp. 1149-1152. https://doi.org/10.1126/science.aao5989

A valley valve and electron beam splitter. / Li, Jing; Zhang, Rui Xing; Yin, Zhenxi; Zhang, Jianxiao; Watanabe, Kenji; Taniguchi, Takashi; Liu, Chaoxing; Zhu, Jun.

In: Science, Vol. 362, No. 6419, 07.12.2018, p. 1149-1152.

Research output: Contribution to journalArticle

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AU - Li, Jing

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Li J, Zhang RX, Yin Z, Zhang J, Watanabe K, Taniguchi T et al. A valley valve and electron beam splitter. Science. 2018 Dec 7;362(6419):1149-1152. https://doi.org/10.1126/science.aao5989