Edge states of ABA Trilayer Graphene Nanoribbons

ORAL

Abstract

Due to mirror symmetry the bands of ABA stacked trilayer graphene can be identified by their parity with respect to mirror symmetry. The even parity bands exhibit gapped bilayer graphene-like dispersion, while the odd parity bands exhibit a gapped graphene-like dispersion. Using a tight binding model with Slonczewski-Weiss-McClure parameters we look at the edge states in trilayer graphene nanoribbons in the quantum hall regime. Both armchair and zigzag edge nanoribbons are analyzed. When mirror symmetry is preserved, the system exhibits quantized longitudinal conductance at charge neutrality point, due to counterpropagating even and odd parity edge modes. We study the effects of perpendicular electric field and mirror symmetry breaking disorder on the longitudinal conductance.

*This work is supported by NSF EFRI-1433395.

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Presenters

  • Kuan Zhou

    • Univ of California - Riverside

Authors

  • Kuan Zhou

    • Univ of California - Riverside

  • Yafis Barlas

    • Univ of California - Riverside
    • Physics and Astronomy, University of California, Riverside
    • Computer and Electrical Engineering, University of California at Riverside
    • Physics, University of California, Riverside
    • University of California, Riverside

  • Roger Lake

    • Electrical and computer Engineering, Univ of California - Riverside
    • Department of Electrical and Computer Engineering, University of California, Riverside
    • University of California, Riverside
    • Univ of California - Riverside
    • Electrical and Computer Engineering, University of California, Riverside
    • University of Califoria Riverside
    • University of California Riverside
    • Department of Electrical and Computer Engineering, Univ of California - Riverside
    • Electrical and Computer Engineering, University of California Riverside