Graphene - Armchair vs Zigzag - Semiconductor?

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    Graphene Semiconductor
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SUMMARY

The discussion focuses on the differences between zigzag and armchair graphene nanoribbons, highlighting that zigzag edges exhibit metallic properties while armchair edges can display both semiconducting and metallic characteristics. The orientation of graphene significantly influences its electrical conductance; specifically, when armchair patterns align along the sides of a nanoribbon, achieving semiconducting properties may be challenging. Additionally, the conductance properties are affected by the application of periodic boundary conditions in nanoribbons. Relevant academic resources were requested to further explore these concepts.

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HenryA.
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Graphene - Semiconducting and metallic dependence on edge properties.
I have a question concerning the differentiation between the zigzag and armchair pattern of graphene. Specifically concerning the fact that zigzag edges produce metallic properties and armchair edges producing semiconducting/metallic properties.

How does this relate to the orientation of graphene? As in, if I were to measure the conductance across a nanoribbon of graphene and it is oriented such that the armchair patterns are long the sides, is there no way for me to get the semiconducting property? And how does this property dependence change when I look at a nanoribbon with periodic boundary conditions?
 
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Can you post some links to the papers and textbooks you've been using to study this? Thanks.
 
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