| Popis: |
We report a study of transport in crossed electric and magnetic fields in a double harrier tunneling structure with a wide (600 A) well. Experiments were conducted on a lattice-matched GaInAs/AlInAs structure at 1.5 K in magnetic fields up to 23 T. At zero tesla we observe 21 resonances, 11 of which correspond to extended state resonances for biases > 0.85 V. Upon the application of a transverse magnetic field, the bound resonances evolve into magneto-electric states and arc shifted to higher biases. In the low bias range, for high magnetic fields, additional resonances from barrier-bound states are observed. Simple semi-classical considerations of electronic motion in crossed fields allow us to determine different regimes (i.e. traversing, skipping, bulk-like) in the magnetic field-bias voltage space of the resonances. |
