Shot noise reduction in quantum wires with "0.7 structure"
A. Ramsak, J. H. Jefferson
TL;DR
This paper explains shot noise reduction in quantum wires with the '0.7 structure' by linking the Fano factor to conductance features and the singlet-triplet resonance nature, predicting an additional '0.25 structure' in conductance.
Contribution
It introduces a model connecting shot noise reduction to the '0.7 structure' in conductance, emphasizing the role of singlet-triplet resonances and predicting a new conductance feature.
Findings
Fano factor structure relates to conductance due to singlet-triplet resonances
Prediction of an additional '0.25 structure' in conductance
Shot noise reduction explained by resonance probability ratios
Abstract
Shot noise reduction in quantum wires is interpreted within the model for the ''0.7 structure'' in the conductance of near perfect quantum wires [T. Rejec, A. Ramsak, and J.H. Jefferson, Phys. Rev. B 62, 12985 (2000)]. It is shown how the Fano factor structure is related to the specific structure of the conductance as a consequence of the singlet--triplet nature of the resonances with the probability ratio 1:3. An additional feature in the Fano factor, related to the ''0.25 structure'' in conductance, is predicted.
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