Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 106: Transport, magnetotransport and quantum Hall physics

HL 106.2: Vortrag

Freitag, 20. März 2015, 10:15–10:30, EW 202

Observation of quantum states bound by a magnetic field gradient — Bernd Schüler¹, Mihai Cerchez¹, •Thomas Heinzel¹, Dirk Reuter², Andreas Wieck³, and Hengyi Xu¹ — ¹Inst. für Physik d. kondensierten Materie, HHU Düsseldorf — ²Department Physik, Univ. Paderborn — ³Angewandte Festkörperphysik, Ruhr-Universität Bochum

Resonant transmission through electronic quantum states that exist at the zero points of a magnetic field gradient inside a ballistic quantum wire is reported. Since the semiclassical motion along such a line of zero magnetic field takes place in form of unidirectional snake trajectories, these states have no classical equivalence. The existence of such quantum states has been predicted more than a decade ago by theoretical considerations.[1] We further show how their properties depend on the amplitude of the magnetic field profile as well as on the Fermi energy.[2]

[1]J. Reijniers et al., Europhys. Lett. 59, 749 (2002). [2] B. Schüler et al., Phys. Rev. B (Rapid Comm.), in print.