Manipulating electron waves in graphene using carbon nanotube gating

Shiang Bin Chiu, Alina Mreńca-Kolasińska, Ka Long Lei, Ching Hung Chiu, Wun Hao Kang, Sz-Chao Chen, Ming Hao Liu

研究成果: Article同行評審

3 引文 斯高帕斯(Scopus)


Graphene with its dispersion relation resembling that of photons offers ample opportunities for applications in electron optics. The spacial variation of carrier density by external gates can be used to create electron waveguides, in analogy to optical fiber, with additional confinement of the carriers in bipolar junctions leading to the formation of few transverse guiding modes. We show that waveguides created by gating graphene with carbon nanotubes (CNTs) allow obtaining sharp conductance plateaus, and propose applications in the Aharonov-Bohm and two-path interferometers, and a pointlike source for injection of carriers in graphene. Other applications can be extended to Bernal-stacked or twisted bilayer graphene or two-dimensional electron gas. Thanks to their versatility, CNT-induced waveguides open various possibilities for electron manipulation in graphene-based devices.

期刊Physical Review B
出版狀態Published - 2022 5月 15

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學


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