Fano factor reduction on the 0.7 conductance structure of a ballistic one-dimensional wire |
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| Authors: | Roche P Ségala J Glattli D C Nicholls J T Pepper M Graham A C Thomas K J Simmons M Y Ritchie D A |
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| Affiliation: | Nanoelectronic group, Service de Physique de l'Etat Condensé, CEA Saclay, F-91191 Gif-sur-Yvette, France. |
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| Abstract: | We have measured the nonequilibrium current noise in a ballistic one-dimensional wire which exhibits an additional conductance plateau at 0.7x2e(2)/h. The Fano factor shows a clear reduction on the 0.7 structure, and eventually vanishes upon applying a strong parallel magnetic field. These results provide experimental evidence that the 0.7 structure is associated with two conduction channels that have different transmission probabilities. |
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