Electron fractionalization in two-dimensional graphenelike structures

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dc.creatorHou, Chang-Yu
dc.creatorChamon, Claudio
dc.creatorMudry, Christopher
dc.date2006-09-28
dc.date2007-05-21
dc.date.accessioned2026-07-07T10:40:51Z
dc.date.available2026-07-07T10:40:51Z
dc.descriptionElectron fractionalization is intimately related to topology. In one-dimensional systems, fractionally charged states exist at domain walls between degenerate vacua. In two-dimensional systems, fractionalization exists in quantum Hall fluids, where time-reversal symmetry is broken by a large external magnetic field. Recently, there has been a tremendous effort in the search for examples of fractionalization in two-dimensional systems with time-reversal symmetry. In this letter, we show that fractionally charged topological excitations exist on graphenelike structures, where quasiparticles are described by two flavors of Dirac fermions and time-reversal symmetry is respected. The topological zero-modes are mathematically similar to fractional vortices in p-wave superconductors. They correspond to a twist in the phase in the mass of the Dirac fermions, akin to cosmic strings in particle physics.
dc.description4 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0609740
dc.identifierhttp://arxiv.org/abs/cond-mat/0609740
dc.identifierPhys.Rev.Lett.98:186809,2007
dc.identifierdoi:10.1103/PhysRevLett.98.186809
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/181455
dc.subjectMesoscale and Nanoscale Physics
dc.subjectHigh Energy Physics - Theory
dc.titleElectron fractionalization in two-dimensional graphenelike structures
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