Gap properties of helical edge states in two-dimensional topological insulators with time-dependent magnetic impurities
The quantum mechanical equivalent of the classical Hall effect can lead to interesting results in solid state physics. A similar effect, that has received attention in recent years, occurs when large spin-orbit coupling is present in a material, the so-called quantum-spin Hall effect. In two-dimensional materials it leads to so-called helical edge states that exhibit counter-propagating electron s