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Canted antiferromagnetic phase in a double quantum well in a tilted quantizing magnetic field | | V.S. Khrapai
; E.V. Deviatov
; A.A. Shashkin
; V.T. Dolgopolov F. Hastreiter
; A. Wixforth K.L. Campman
; A.C.Gossard
; | | Date: |
26 Mar 1999 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Affiliation: | Institute of Solid State Physics, Chernogolovka, Moscow, Russia) F. Hastreiter, A. Wixforth (Ludwig-Maximilians-Universität, München, Germany) K.L. Campman, A.C.Gossard (Materials Department and Center for Quantized Electronic Structures, Uni | | Abstract: | We investigate the double-layer electron system in a parabolic quantum well at filling factor $
u=2$ in a tilted magnetic field using capacitance spectroscopy. The competition between two ground states is found at the Zeeman splitting appreciably smaller than the symmetric-antisymmetric splitting. Although at the transition point the system breaks up into domains of the two competing states, the activation energy turns out to be finite, signaling the occurrence of a new insulator-insulator quantum phase transition. We interpret the obtained results in terms of a predicted canted antiferromagnetic phase. | | Source: | arXiv, cond-mat/9903396 | | Services: | Forum | Review | PDF | Favorites | |
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