Fano factor reduction on the 0.7 structure in a ballistic   one-dimensional wire
  We have measured the non-equilibrium current noise in a ballisticone-dimensional wire which exhibits an additional conductanceplateau at $0.7\times2e^2/h$. The Fano factor shows a clearreduction on the 0.7 structure, and eventually vanishes uponapplying a strong parallel magnetic field. These results provideexperimental evidence that the 0.7 structure is associated withtwo conduction channels which have different transmissionprobabilities. 
P. Roche, J. Segala, D. C. Glattli, J. T. Nicholls, M. Pepper, A. C.   Graham, K. J. Thomas, M. Y. Simmons, D. A. Ritchie