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Author Zhou, Bin ♦ Lu, Hai-Zhou ♦ Chu, Rui-Lin ♦ Shen, Shun-Qing ♦ Niu, Qian
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2008-06-30
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics
Subject Keyword Condensed Matter - Mesoscale and Nanoscale Physics ♦ Condensed Matter - Materials Science ♦ physics:cond-mat
Abstract The 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.
Description Reference: Phys. Rev. Lett. 101, 246807 (2008)
Educational Use Research
Learning Resource Type Article
Page Count 4


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