Numerical Investigation on Asymmetric Bilayer System at Integer Filling Factor
K. Nomura, D. Yoshioka, T. Jungwirth, A. H. MacDonald
Abstract
Deformation of the easy-axis ferromagnetic state in asymmetric bilayer systems are investigated numerically. Using the exact diagonalization the easy-axis to easy-plane ferromagnetic transition at total filling factor 3 or 4 is investigated. At still higher filling, novel stripe state in which stripes are aligned in the vertical direction occurs. The Hartree-Fock energies of relevant ordered states are calculated and compared.
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