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V I Fal'ko et al 2001 Phys.-Usp. 44 49 doi:10.1070/1063-7869/44/10S/S09

Hidden SU(4) symmetry in bilayer quantum well at integer filling factors

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V I Fal'ko1, S V Iordanskii2 and A B Kashuba2

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Abstract

2. QUANTUM HALL EFFECT

Phase diagram of a bilayer quantum well at integer filling factors is established using the hidden symmetry method. Three phases: ferromagnetic, canted antiferromagnetic (CAP) and spin-singlet, have been found. We confirm early results of Das Sarma et al. Each phase violates the SU(4) hidden symmetry and is stabilized by the anisotropy interactions.


PACS

73.43.Cd Theory and modeling

71.70.-d Level splitting and interactions

73.43.-f Quantum Hall effects

Subjects

Condensed matter: electrical, magnetic and optical

Surfaces, interfaces and thin films

Dates

Issue 10S ( 1 October 2001)

Received 1 October 2001



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