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Wigner Crystal State for the Edge Electrons in the Quantum Hall Effect at Filling
J. P. Rodriguez, M. J. Franco, L. Brey
The electronic excitations at the edges of a Hall bar not much wider than a few magnetic lengths are studied theoretically at filling . Both mean-field theory and Luttinger l…
Stability and dynamics of free magnetic polarons
M. J. Calderon, L. Brey, P. B. Littlewood
The stability and dynamics of a free magnetic polaron are studied by Monte Carlo simulation of a classical two-dimensional Heisenberg model coupled to a single electron. We compare…
Effect of the Equivalence Between Topological and Electric Charge on the Magnetization of the Hall Ferromagnet
Luis Brey
The dependence on temperature of the spin magnetization of a two-dimensional electron gas at filling factor unity is studied. Using classical Monte Carlo simulations we analyze the…
Magnetic Domain Walls in Double Exchange Materials
Luis Brey
We study magnetic domain walls in double exchange materials. The domain wall width is proportional to the square root of the stiffness. In the double exchange model the stiffness h…
Electromodulation of the bilayer =2 quantum Hall phase diagram
L. Brey, E. Demler, S. Das Sarma
We make a number of precise experimental predictions for observing the various magnetic phases and the quantum phase transitions between them in the =2 bilayer quantum Ha ll sys…