Studying the Effects of Strain on Notched Zigzag Graphene Nanoribbons

Studying the Effects of Strain on Notched Zigzag Graphene Nanoribbons

Using a generalised tight-binding model, the combined effects of asymmetric (square or V-shaped) notch and uniaxial strain are studied in a zigzag graphene nanoribbon (ZGNR) system. Within the formalism of Landauer-Büttiker, the spin polarisation and conductance-gap properties were found to be tunable for uniaxial strain along the ribbon-length and ribbon-width for an ideal ZGNR and square (V-shaped) notched ZGNR systems. Important notch-dependent reductions to the conduction distance were initiated by Uniaxial strain along the ribbon-width for strains ≤ 10 percent. Important variations in the spin-dependent conduction results with respect to the system-type are seen at 20 percent strain in the y-direction. It is found that a square-shaped notch limits the conduction-gap starting at 10 percent pressure. These strains also induced spin-dependent modifications for the V-shaped notch, resulting in a semi-conductive state and metallic state for each respective spin-type at 20 percent strain, thus demonstrating potential quantum mechanisms for spin-filtration.

Author (s) Details

Jack Baldwin
Department of Physics, The University of York, Heslington, York, YO10 5DD, UK.

Y. Hancock
Department of Physics, The University of York, Heslington, York, YO10 5DD, UK.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/352

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