Velocity and confinement of edge plasmons in HgTe-based two-dimensional topological insulators
Velocity and confinement of edge plasmons in HgTe-based two-dimensional topological insulators
High-frequency transport in the edge states of the quantum spin Hall (QSH) effect has to date rarely been explored, though it could cast light on the scattering mechanisms taking place therein. We here report on the measurement of the plasmon velocity in topological HgTe quantum wells both in the QSH …