Finite size effects of helical edge states in HgTe/CdTe quantum wells

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dc.creatorZhou, Bin
dc.creatorLu, Hai-Zhou
dc.creatorChu, Rui-Lin
dc.creatorShen, Shun-Qing
dc.creatorNiu, Qian
dc.date2008-06-30
dc.date.accessioned2026-07-07T12:20:45Z
dc.date.available2026-07-07T12:20:45Z
dc.descriptionThe solutions for the helical edge states for an effective continuum model for the quantum spin Hall effect in HgTe/CdTe quantum wells are presented. For a sample of a large size, the solution gives the linear dispersion for the edge states. However, in a finite strip geometry, the edge states at two sides will couple with each other, which leads to a finite energy gap in the spectra. The gap decays in an exponential law of the width of sample. The magnetic field dependence of the edge states illustrates the difference of the edge states from those of a conventional quantum Hall strip of two-dimensional electron gas.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0806.4810
dc.identifierhttp://arxiv.org/abs/0806.4810
dc.identifierPhys. Rev. Lett. 101, 246807 (2008)
dc.identifierdoi:10.1103/PhysRevLett.101.246807
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/213155
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMaterials Science
dc.titleFinite size effects of helical edge states in HgTe/CdTe quantum wells
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