Suppression of shot noise in quantum point contacts in the "0.7 regime"

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Experimental investigations of current shot noise in quantum point contacts show a reduction of the noise near the 0.7 anomaly. It is demonstrated that such a reduction naturally arises in a model proposed recently to explain the characteristics of the 0.7 anomaly in quantum point contacts in terms of a quasibound state, due to the emergence of two conducting channels. We calculate the shot noise as a function of temperature, applied voltage, and magnetic field, and demonstrate an excellent agreement with experiments. It is predicted that, with decreasing temperature, voltage, and magnetic field, the dip in the shot noise is suppressed due to the Kondo effect.

Original languageEnglish
Article number186801
JournalPhysical Review Letters
Issue number18
StatePublished - 8 Nov 2006

ASJC Scopus subject areas

  • Physics and Astronomy (all)


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