Stark-cyclotron resonance in a semiconductor superlattice

Electron transport in crystals in intense parallel electric and magnetic fields is investigated. Current resonances are shown for particular ratios of electric and magnetic fields satisfying the Stark-cyclotron resonance (SCR) condition. At SCR, the potential drop per period is an integer multiple of the magnetic quantization energy and elastic tunneling transport between Landau levels belonging to neighboring crystal sites becomes possible. Unambiguous demonstration of SCR in an appropriately tailored heterojunction superlattice is given for transitions involving up to four Landau-level index changes.