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Singular flat bands in the modified Haldane-Dice model
Alexander Filusch, Holger Fehske
Flat bands can be divided into singular and non-singular ones according to the behavior of their Bloch wave function around band-crossing points in momentum space. We analyze the f…
Quantized charge transport in disordered Floquet topological insulators in the absence of Anderson localization
Lennard Berg, Andreas Alvermann, Holger Fehske
We perform a numerical study of Floquet topological insulators with temporal disorder to investigate the existence of quantized charge transport without Anderson localization. We f…
Tunable valley filtering in dynamically strained - lattices
Alexander Filusch, Holger Fehske
Mechanical deformations in - lattices induce local pseudomagnetic fields of opposite directionality for different valleys. When this strain is equipped with a dyn…
Scrutinizing the Debye plasma model: Rydberg excitons unravel the properties of low-density plasmas in semiconductors
Heinrich Stolz, Dirk Semkat, Rico Schwartz +5
For low-density plasmas, the classical limit described by the Debye-Hückel theory is still considered as an appropriate description even though a clear experimental proof of this p…
Immutable quantized transport in Floquet chains
Bastian Höckendorf, Andreas Alvermann, Holger Fehske
We show how quantized transport can be realized in Floquet chains through encapsulation of a chiral or helical shift. The resulting transport is immutable rather than topological i…
Valley filtering in strain-induced - quantum dots
Alexander Filusch, Alan R. Bishop, Avadh Saxena +2
We test the valley-filtering capabilities of a quantum dot inscribed by locally straining an - lattice. Specifically, we consider an out-of-plane Gaussian bump in…