Magnetotransport of a Quantum Hall Double Layer at Landau Level Filling 1/2 $+$3/2

The effect of interlayer-tunneling on electron transport in quantum Hall double layers in the regime of exciton condensation state at Landau level filling factor one (1/2$+$1/2) has been well established, in that the interlayer coherence promotes a huge zero-bias conductance peak due to resonantly-enhanced tunneling (e.g., Phys. Rev. Lett. 84, 5808, 2000) . Consequently, an in-plane magnetic field is found to suppress this tunneling. Recent theoretical work, on a similar system consisting of two layers with fillings 1/2$+$3/2, suggests that here the resonant-enhanced tunneling would be suppressed and an in-plane magnetic field, conversely, would play a promoting role in tunneling. We investigate this regime in high-mobility GaAs/AlGaAs bilayers of suitable parameters and with individually contacted layers. Preliminary results and a brief discussion will be presented.