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In the bilayer quantum Hall coherent state for $\nu_T$ deviating slightlyfrom one, we show that, instead of the global order parameter, the spontaneousbreaking of the pseudospin U(1) rotational symmetry is reflected by theperiodic domain structure accompanying with the charged meron pairs. The motionof meron pairs induces a novel pseudospin wave. The long range order of theperiodic domains in a low bias voltage range leads to the residual zero-biaspeak in the tunneling conductance even when the pseudopsin Goldstone feature ina high bias voltage range can be distinct from it.Comment: 4 pages, 1 figur

A NOVEL MERON-INDUCED PSEUDOSPIN WAVE IN THE BILAYER QUANTUM HALL COHERENT STATE AND THE RESIDUAL ZERO-BIAS PEAK IN TUNNELING CONDUCTANCE