Abstract
Recent experiments have demonstrated the feasibility of performing interwell tunneling spectroscopy in a double-well system in both the low- and high-field regimes. In the quantum Hall regime at low-voltage biases, one expects that interwell tunneling will be dominated by the edge contribution. In this paper, we analyze this contribution using a simple chiral Luttinger-liquid model. In particular, we calculate the nonlinear I(V) characteristics associated with interedge tunneling in the unpolarized [mmn] states (m\ensuremath{\ne}n). We find that interedge tunneling is suppressed for fields perpendicular to the quantum wells. However, in a tilted field geometry, an interedge tunneling resonance is predicted. The amplitude of this resonance exhibits a universal power-law temperature dependence.
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