TITLE

Trajectory domains in a wide-well double-barrier tunneling structure in crossed electric and magnetic fields

AUTHOR(S)
Martin, K. P.; Ben Amor, S.; Rascol, J. J. L.; Higgins, R. J.; Potter, R. C.; Hier, H.
PUB. DATE
April 1990
SOURCE
Applied Physics Letters;4/30/1990, Vol. 56 Issue 18, p1772
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report a study of transport in crossed electric and magnetic (B) fields in a double-barrier tunneling structure with a wide (600 Ã…) well at T=1.5 K and 00.85 V. Under a transverse magnetic field, the bound resonances evolve into magnetoelectric states and are shifted to higher biases. In the low bias range, for high magnetic fields, additional resonances from barrier-bound skipping states are observed. A semiclassical model for ballistic motion in crossed fields is used to determine boundaries between the different trajectory regimes (i.e., traversing, skipping, bulk-like) in the magnetic field-bias voltage space of the resonances. The model shows excellent quantitative agreement with experiment when nonparabolic corrections to the effective mass are included. In addition, the B-induced shift in the transition from bound to extended-state tunneling resonances is explained with this simple description.
ACCESSION #
9834016

 

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