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Magnetic-Field-Induced Hybridization of Electron Subbands in a Coupled Double Quantum Well | | V.T.Dolgopolov
; G.E.Tsydynzhapov
; A.A.Shashkin
; E.V.Deviatov
; F.Hastreiter
; M.Hartung
; A.Wixforth
; K.L.Campman
; A.C.Gossard
; | | Date: |
11 Sep 1997 | | Journal: | JETP Letters, 67, 595 (1998) | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Affiliation: | Institute of Solid State Physics, Chernogolovka, Russia), F.Hastreiter, M.Hartung, A.Wixforth (Ludwig-Maximilians-Universitat, Munich, Germany), K.L.Campman, A.C.Gossard (Materials Department and Center for Quantized Electronic Structures, Santa Barbar | | 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 in the centre. In this system unbalanced by gate depletion, at temperatures $Tagt 30$ mK we observe two sets of quantum oscillations: 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 $
u=1$ and $
u=2$, both the common gap presence down to the point of one- to two-subband transition and their non-trivial magnetic field dependences point to magnetic-field-induced hybridization of electron subbands. | | Source: | arXiv, cond-mat/9709130 | | Services: | Forum | Review | PDF | Favorites | |
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