Edge-dependent selection rules in magic triangular graphene flakes

Details Edge-dependent selection rules in magic triangular graphene flakes Edge-dependent selection rules in magic triangular graphene flakes

2008-04-06

arxiv.org/abs/0804.0918v1

Phys. Rev. B 77, 193410 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.77.193410

The electronic shell and supershell structure of triangular graphene quantum dots has been studied using density functional and tight-binding methods. The density functional calculations demonstrate that the electronic structure close to the Fermi energy is correctly described with a simple tight-binding model where only the p_z orbitals perpendicular to the graphene layer are included. The results show that (i) both at the bottom and at the top of the p_z band a supershell structure similar to that of free electrons confined in a triangular cavity is seen, (ii) close to the Fermi level the shell structure is that of free massless particles, (iii) triangles with armchair edges show an additional sequence of levels ('ghost states') absent for triangles with zigzag edges while the latter exhibit edge states, and (iv) the observed shell structure is rather insensitive to the edge roughness.

Affiliated with

Also associated with

No associations

Rating

Edge-dependent selection rules in magic triangular graphene flakes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Edge-dependent selection rules in magic triangular graphene flakes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Edge-dependent selection rules in magic triangular graphene flakes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-337346