On the density of states of circular graphene quantum dots
Abstract
We suggest a simple approach to calculate the local density of states that effectively applies to any structure created by an axially symmetric potential on a continuous graphene sheet such as circular graphene quantum dots or rings. Calculations performed for the graphene quantum dot studied in a recent scanning tunneling microscopy measurement [ Gutierrez et al. Nat. Phys. 12, 1069--1075 (2016)] show an excellent experimental-theoretical agreement.
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