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Order parameter suppression in double layer quantum Hall ferromagnets
Yogesh N. Joglekar, Allan H. MacDonald
Double-layer quantum Hall systems at Landau level filling factor have a broken symmetry ground state with spontaneous interlayer phase coherence and a gap between symmetric a…
First-Order Phase Transition in a Quantum Hall Ferromagnet
Vincenzo Piazza, Vittorio Pellegrini, Fabio Beltram +3
The single-particle energy spectrum of a two-dimensional electron gas in a perpendicular magnetic field consists of equally-spaced spin-split Landau levels, whose degeneracy is pro…
Fractional-quantum-Hall edges at filling factor 1-1/m
U. Zuelicke, A. H. MacDonald, M. D. Johnson
We consider the edge of a two-dimensional electron system that is in the quantum-Hall-effect regime at filling factor 1-1/m with m being an odd integer, where microscopic theory ex…
Quantum Dynamics of Pseudospin Solitons in Double-Layer Quantum Hall Systems
Jordan Kyriakidis, Daniel Loss, A. H. MacDonald
Pseudospin solitons in double-layer quantum Hall systems can be introduced by a magnetic field component coplanar with the electrons and can be pinned by applying voltages to exter…
Nondissipative Drag Conductance as a Topological Quantum Number
Kun Yang, A. H. MacDonald
We show in this paper that the boundary condition averaged nondissipative drag conductance of two coupled mesoscopic rings with no tunneling, evaluated in a particular many-particl…
Broken Symmetry Ground States in ν=2 Bilayer Quantum Hall Systems
A. H. MacDonald, R. Rajaraman, T. Jungwirth
We report on a study of a bilayer two-dimensional electron gas at Landau level filling factor . The system exhibits both magnetic and spontaneous interlayer phase coherence br…