11 papers
Electrostatic Control Enables Robust Helical Edge Channel Transport in III-V Quantum Spin Hall Insulators
Manuel Meyer, Tobias Fähndrich, Sebastian Schmid +12
Quantum spin Hall transport in InAs/GaInSb-based two-dimensional topological insulators can be limited by parasitic bulk and edge contributions. We demonstrate that these limitatio…
Electrically driven Rabi dynamics of magnetic-field-induced corner states in a two-dimensional topological insulator
D. V. Khomitsky, E. A. Lavrukhina, D. P. Krasavin +2
We study coherent electric manipulation of magnetic-field-induced localized states at a double kink of a helical edge in a HgTe/CdHgTe quantum well. An in-plane magnetic field open…
Magnetic-field-induced corner states in quantum spin Hall insulators
Sergey S. Krishtopenko, Frédéric Teppe
We address the problem of magnetic-field-induced corner states in quantum spin Hall insulators (QSHIs) beyond the particle-hole-symmetric limit. Starting from a realistic low-energ…
Many-particle hybridization of optical transitions from zero-mode Landau levels in HgTe quantum wells
S. Ruffenach, S. S. Krishtopenko, A. V. Ikonnikov +6
We present far-infrared magnetospectroscopy measurements of a HgTe quantum well in the inverted band structure regime over the temperature range of 2 to 60 K. The particularly low…
Nonlinear Terahertz Electroluminescence from Dirac Landau Polaritons
B. Benhamou-Bui, C. Consejo, S. S. Krishtopenko +15
We report Dirac Landau polaritons observed by terahertz (THz) magnetoreflectivity spectroscopy, demonstrating strong coupling between cyclotron transitions of two-dimensional (2D)…
Resonant Dyakonov-Shur Magnetoplasmons in Graphene Terahertz Photodetectors
Juan A. Delgado-Notario, Cedric Bray, Elsa Perez-Martin +16
Graphene plasmons confine incident terahertz fields far below the diffraction limit and, when hosted by a gate-defined Fabry-Perot cavity, enable electrically tunable, frequency-se…