Resonant tunneling in CdTe/${\mathrm{Cd}}_{1\mathrm{-}\mathit{x}}$${\mathrm{Mg}}_{\mathit{x}}$Te double-barrier single-quantum-well heterostructures

We report the observation of resonant tunneling through CdTe/${\mathrm{Cd}}_{1\mathrm{-}\mathit{x}}$ ${\mathrm{Mg}}_{\mathit{x}}$Te double barrier, single-quantum-well heterostructures. Pronounced negative differential resistance has been observed in the current-voltage characteristics with peak-to-valley ratios up to 8:1 at 4.2 K. Vertical transport across the double barrier has been analyzed in detail as a function of temperature and applied magnetic fields. © 1996 The American Physical Society.