Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2012-03-25
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
16 pages, 4 figures
Scientific paper
The quantum-Hall-effect (QHE) occurs in topologically-ordered states of two-dimensional (2d) electron-systems in which an insulating bulk-state coexists with protected 1d conducting edge-states. Owing to a unique topologically imposed edge-bulk correspondence these edge-states are endowed with universal properties such as fractionally-charged quasiparticles and interference-patterns, which make them indispensable components for QH-based quantum-computation and other applications. The precise edge-bulk correspondence, conjectured theoretically in the limit of sharp edges, is difficult to realize in conventional semiconductor-based electron systems where soft boundaries lead to edge-state reconstruction. Using scanning-tunneling microscopy and spectroscopy to follow the spatial evolution of bulk Landau-levels towards a zigzag edge of graphene supported above a graphite substrate we demonstrate that in this system it is possible to realize atomically sharp edges with no edge-state reconstruction. Our results single out graphene as a system where the edge-state structure can be controlled and the universal properties directly probed.
Abanin Dmitry
Andrei Eva Y.
Levitov Leonid
Li Guohong
Luican Adina
No associations
LandOfFree
Evolution of Landau Levels into Edge States at an Atomically Sharp Edge in Graphene 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 Evolution of Landau Levels into Edge States at an Atomically Sharp Edge in Graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of Landau Levels into Edge States at an Atomically Sharp Edge in Graphene will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-639214