Electron states in graphene nano-disks

Extensive studies have been done on graphene nano-ribbons (GNRs). However, there are few studies on electronic properties of graphene nano-disks (GNDs). This paper focuses on electron states of GNDs and investigated different types. Most previously reported researches which have been done regarding these systems are usually limited to single particle picture through the tight bonding approach and some of them are based on the Density Functional Theory (DFT) and include some partial effects of these many-body systems. Here, our investigation includes full two-particle viewpoint with consideration of spin and electron-electron (e-e) interaction.