Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-11-24
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
15 pages
Scientific paper
A charged particle whose energy is less than the electric potential step it is incident upon, is expected to undergo partial reflection and transmission. In bilayer graphene, however, a potential step in the form of an antisymmetric kink results in particle localization due to the interaction between the particle and its chiral partner. It is found that when the potential step exceeds a threshold, zero-energy modes of the system emerge, and causes the kink to acquire a charge. The Hall-effect plateaus in the vicinity of the zero modes correspond, unexpectedly, to those of the monolayer. The topological nature of these kink-induced effects and the ease with which a kink can be generated in practice, suggest possible applications in e.g. storage of information or switching devices.
Jalil Mansoor B. A.
Martinez Juan Carlos
Tan Seng Ghee
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