Phase diagram and skyrmion energy for bilayer heterostructures at integer filling factors

  • S. V. Iordanski
  • A. Kashuba
Condensed Matter

Abstract

The phase diagram of a bilayer heterostructure at integer filling factors was established using the hidden symmetry method. Three phases, namely, ferromagnetic, canted antiferromagnetic (CAP), and spin-singlet, were found. We confirm early results of Das Sarma et al. Each phase violates the SU(4) hidden symmetry and is stabilized by anisotropy interactions. A charged excitation in the bilayer, i.e., a skyrmion, was found and its anisotropic energy gap was calculated. The gap has a prominent minimum in the CAP.

PACS numbers

75.70.Cn 75.10.−b 

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Copyright information

© MAIK "Nauka/Interperiodica" 2000

Authors and Affiliations

  • S. V. Iordanski
    • 1
  • A. Kashuba
    • 1
  1. 1.Landau Institute for Theoretical PhysicsRussian Academy of SciencesMoscowRussia

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