Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-09-22
Phys. Rev. B 83, 075110 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
10.1103/PhysRevB.83.075110
We study the topologically non-trivial semi-metals by means of the 6-band Kane model. Existence of surface states is explicitly demonstrated by calculating the LDOS on the material surface. In the strain free condition, surface states are divided into two parts in the energy spectrum, one part is in the direct gap, the other part including the crossing point of surface state Dirac cone is submerged in the valence band. We also show how uni-axial strain induces an insulating band gap and raises the crossing point from the valence band into the band gap, making the system a true topological insulator. We predict existence of helical edge states and spin Hall effect in the thin film topological semi-metals, which could be tested with future experiment. Disorder is found to significantly enhance the spin Hall effect in the valence band of the thin films.
Chu Rui-Lin
Lu Jie
Shan Wen-Yu
Shen Shun-Qing
No associations
LandOfFree
Surface and Edge States in Topological Semi-metals 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 Surface and Edge States in Topological Semi-metals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface and Edge States in Topological Semi-metals will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-637644