Anisotropic Transport of Quantum Hall Meron-Pair Excitations
Abstract
Double-layer quantum Hall systems at total filling factor T=1 can exhibit a commensurate-incommensurate phase transition driven by a magnetic field B oriented parallel to the layers. Within the commensurate phase, the lowest charge excitations are believed to be linearly-confined Meron pairs, which are energetically favored to align with B. In order to investigate this interesting object, we propose a gated double-layer Hall bar experiment in which B can be rotated with respect to the direction of a constriction. We demonstrate the strong angle-dependent transport due to the anisotropic nature of linearly-confined Meron pairs and discuss how it would be manifested in experiment.
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