Science
Electrons on the edge: Atomically thin quantum spin hall materials – Phys.org
Quantum spin Hall insulators are a class of two-dimensional (2D) topological states of matter that are electrically insulating in their interior but, unlike semiconductors,…
Quantum spin Hall insulators are a class of two-dimensional (2D) topological states of matter that are electrically insulating in their interior but, unlike semiconductors, carry a pair of one-dimensional (1D) metallic states, which are strictly confined to their edges.
Particular to these ‘edgy’ 1D electrons is that they are what physicists call helical: ie, the spins of conduction electrons are aligned and tied to the direction that electrons move along the 1D edge, akin to a pair of spin-polarized…
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