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Metastable phase in the quantum Hall ferromagnet

Piazza, Vincenzo ; Pellegrini, Vittorio ; Beltram, Fabio ; Wegscheider, Werner



Abstract

Time-dependent capacitance measurements reveal an unstable phase of electrons in gallium arsenide quantum well that occurs when two Landau levels with opposite-spin are brought close to degeneracy by applying a gate voltage. This phase emerges below a critical temperature and displays a peculiar non-equilibrium dynamical evolution. The relaxation dynamics is found to follow a ...

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