Abstract
We study the dynamics of electrons in a semiconductor superlattice under the action of large applied electric $\mathbf{F}$ and magnetic fields $\mathbf{B}$ (up to $47\phantom{\rule{0.3em}{0ex}}\mathrm{T}$). We show that the coupling of the Bloch and cyclotron oscillations in the tilted $\mathbf{B}$ geometry generates a magnetic-field-induced miniband structure and an extended electron motion across many periods of the superlattice. The spatially extended character of the electronic states is analogous to the delocalization of the electron orbit in a semiclassical description of the electron motion and explains our observation of a strong resonant enhancement of the current flow through the superlattice.
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