ISSN:
1090-6487
Keywords:
73.20.Dx
;
73.40.Hm
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We employ a magnetocapacitance technique to study the spectrum of the soft two-subband (or double-layer) electron system in a parabolic quantum well with a narrow tunnel barrier at the center. In this system, when unbalanced by gate depletion, two sets of quantum oscillations are observed at temperatures T≳30 mK: one originates from the upper electron subband in the closer-to-the-gate part of the well, and the other indicates the existence of common gaps in the spectrum at integer fillings. For the lowest filling factors υ=1 and υ=2, both the presence of a common gap down to the point of the one-to two-subband transition and their nontrivial magnetic field dependences point to magnetic-field-induced hybridization of electron subbands.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1134/1.567732
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