Topological Transition of Dirac Points in a Microwave Experiment
Abstract
By means of a microwave tight-binding analogue experiment of a graphenelike lattice, we observe a topological transition between a phase with a pointlike band gap characteristic of massless Dirac fermions and a gapped phase. By applying a controlled anisotropy on the structure, we investigate the transition directly via density of states measurements. The wave function associated with each eigenvalue is mapped and reveals new states at the Dirac point, localized on the armchair edges. We find that with increasing anisotropy, these new states are more and more localized at the edges.
- Publication:
-
Physical Review Letters
- Pub Date:
- January 2013
- DOI:
- 10.1103/PhysRevLett.110.033902
- arXiv:
- arXiv:1210.4642
- Bibcode:
- 2013PhRvL.110c3902B
- Keywords:
-
- 42.70.Qs;
- 03.65.Nk;
- 71.20.-b;
- 73.22.Pr;
- Photonic bandgap materials;
- Scattering theory;
- Electron density of states and band structure of crystalline solids;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- Physical Review Letters (2013) XXX