Imaging coherent transport in chemical vapor deposition graphene wide constriction by scanning gate microscopy
- Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522 (Japan)
- Graduate Institute of Applied Physics, National Taiwan University, Taipei 106, Taiwan (China)
- Department of Physics, National Taiwan University, Taipei 106, Taiwan (China)
- Department of Electrophysics, National Chiayi University, Chiayi 600, Taiwan (China)
- Graduate School of Science, Chiba University, Chiba 263-8522 (Japan)
We use a scanning gate microscopy to perturb coherent transport in chemical vapor deposition (CVD) graphene wide constriction. Particularly, we observe conductance oscillations in the wide constriction region (W ∼ 800 nm) characterized by spatial conductance variations, which imply formation of the nanometer-scale ring structure due to the merged domains and intrinsic grain boundaries. Moreover, additional hot charges from high current can suppress the coherent transport, suggesting that the hot carriers with a wide spreading kinetic energy could easily tunnel merged domains and intrinsic grain boundaries in CVD-grown graphene due to the heating effect, a great advantage for applications in graphene-based interference-type nano-electronics.
- OSTI ID:
- 22591481
- Journal Information:
- Applied Physics Letters, Vol. 108, Issue 12; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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