Please use this identifier to cite or link to this item: https://doi.org/33/335302
Title: Charge fractionalization in biased bilayer graphene
Authors: Martinez, J.C. 
Jalil, M.B.A. 
Tan, S.G. 
Issue Date: 22-Aug-2012
Source: Martinez, J.C.,Jalil, M.B.A.,Tan, S.G. (2012-08-22). Charge fractionalization in biased bilayer graphene. Journal of Physics Condensed Matter 24 (33) : -. ScholarBank@NUS Repository. https://doi.org/33/335302
Abstract: Fractional charge may arise when fermionic zero modes exist in a topological background field. In biased bilayer graphene (BBLG), the bias plays the role of the nontrivial background field. When semi-infinite BBLG with a zigzag edge is used, the dynamics induces an odd number of zero-energy modes, which, together with the conjugation symmetry between positive-and negative-energy states, are the requisite conditions for fractionalization. Exploiting the trigonal interaction to isolate a given zero-energy mode on the zigzag edge, we consider extended and localized modes (the latter being obtained from a localized wavepacket generated by prior irradiation of the sample with an electromagnetic vortex). The valley degeneracy is lifted by a layer asymmetry, while an edge-induced spin polarization breaks the spin degeneracy. We describe scenarios for the detection of charge- edge states. © 2012 IOP Publishing Ltd.
Source Title: Journal of Physics Condensed Matter
URI: http://scholarbank.nus.edu.sg/handle/10635/55286
ISSN: 09538984
DOI: 33/335302
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

31
checked on Dec 7, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.