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O: Fachverband Oberflächenphysik
O 2: Heterostructures, interfaces and surfaces (joint session HL/O)
O 2.7: Vortrag
Montag, 16. März 2020, 11:45–12:00, POT 151
Quantum spin Hall quantum point contacts — •niccolo traverso ziani1, bjoern trauzettel2, christoph fleckenstein2, lorenzo privitera2, and maura sassetti1 — 1Università degli Studi di Genova, Genova, Italy — 2Universitaet Wuerzburg, Wuerzburg, Deutschland
The edges of two-dimensional topological insulators are fashinating systems. In order to fully exploit their potential, gaps need to be induced. While superconducting gaps can be implemented, magnetic and interaction-related ones seem to be experimentally challenging. We propose a wide range of possibilities enabled by the gaps that can open when constrictions between helical edges[1] are created. Jackiw-Rebbi charges[2], Majorana bound states[3], parafermions[4] and Floquet bound states[5] are addressed.
[1] J. Strunz, J. Wiedenmann, C. Fleckenstein, L. Lunczer, W. Beugeling, V. L. Mueller, P. Shekhar, N. Traverso Ziani, S. Shamim, J. Kleinlein, H. Buhmann, B. Trauzettel, and L. W. Molenkamp, Nat. Phys. (2019).
[2] C. Fleckenstein, N. Traverso Ziani, and B. Trauzettel EPL (Europhysics Letters) 121, 57003 (2018).
[3] C. Fleckenstein, N. Traverso Ziani, and B. Trauzettel, in preparation
[4] C. Fleckenstein, N. Traverso Ziani, and B. Trauzettel, Phys. Rev. Lett. 122, 066801 (2019)
[5] C. Fleckenstein, N. Traverso Ziani, L. Privitera, M. Sassetti, and B. Trauzettel, arXiv:1908.11719