Non-magnetic defects in the bulk of two-dimensional topological insulators

Abstract

We found that non-magnetic defects in two-dimensional topological insulators induce bound states of two kinds for each spin orientation: electron- and hole-like states. Depending on the sign of the defect potential these states can be also of two kinds with different distribution of the electron density. The density has a maximum or minimum in the center. A surprising effect caused by the topological order is a singular dependence of the bound-state energy on the defect potential.

arXiv comment4 pages, 2 figures, to be published in Physica Status Solidi RRL

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Cited by in corpus (8)

• Helical bound states in the continuum of the edge states in two dimensional topological insulators
• Electronic states induced by nonmagnetic defects in two-dimensional topological insulators
• Two-body problem for two-dimensional electrons in Bernervig-Hughes-Zhang model
• Conductance suppression by nonmagnetic point defects in helical edge channels of two-dimensional topological insulators
• Electrically controlled crossing of energy levels in quantum dots in two-dimensional topological insulators
• Singlet-triplet transition in double quantum dots in two-dimensional topological insulators
• Long-range perturbation of helical edge states by nonmagnetic defects in two-dimensional topological insulators
• Optical transitions in two-dimensional topological insulators with point defects