Bound states of neighboring nodal adsorbates and conductance in metallic armchair graphene nanoribbons
許峻瑜1*, 朱仲夏1
1Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan
* presenting author:Chun Yu Hsu,
An adsorbate located on a nodal site of a metallic armchair graphene naonribbons (AGNRs) is found to form a bound state¹. The bound state wavefunction exhibits anisotropic decaying behavior. It is then of interest to explore the effect of this spatial behavior on the bound states that will form between two or more nodal adsorbates. Issues concerning the relative orientation and the type (A/B) of these neighboring nodal adsorbates will be addressed. Both the wavefunctions and conductance (G) characteristics of these bound states will be presented and discussed. This study allows us to obtain adsorbate-dependent bound state energies that are farther away from the Dirac point. It is known that suppression in G due to weak disorder increases as energy approaches towards the Dirac point. We will also explore the case when the adsorbate is not an ideal nodal type.

Keywords: nodal bound state