Resonantly enhanced nonlinear conductance in long quantum point contacts near pinch-off

T. Morimoto; M. Henmi; R. Naito; K. Tsubaki; N. Aoki; J. P. Bird; Y. Ochiai

doi:10.1103/PhysRevLett.97.096801

Resonantly enhanced nonlinear conductance in long quantum point contacts near pinch-off

T. Morimoto
, M. Henmi
, R. Naito
, K. Tsubaki
, N. Aoki
, J. P. Bird
, Y. Ochiai

Department of Electrical Engineering

Chiba University

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We report on a remarkable resonance in the differential conductance of long quantum point contacts (QPCs) that is observed as a precursor to regular quantized transport. This effect is increasingly pronounced in longer QPCs, in which the differential conductance may resonantly exceed 2e2/h. From a study of the experimental characteristics of this feature, we suggest that it may be associated with the formation of a well-resolved energy gap that opens dynamically as a result of enhanced many-body interactions in long QPCs.

Original language	English
Article number	096801
Journal	Physical Review Letters
Volume	97
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.97.096801
State	Published - 2006

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10.1103/PhysRevLett.97.096801

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abstract = "We report on a remarkable resonance in the differential conductance of long quantum point contacts (QPCs) that is observed as a precursor to regular quantized transport. This effect is increasingly pronounced in longer QPCs, in which the differential conductance may resonantly exceed 2e2/h. From a study of the experimental characteristics of this feature, we suggest that it may be associated with the formation of a well-resolved energy gap that opens dynamically as a result of enhanced many-body interactions in long QPCs.",

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AU - Morimoto, T.

AU - Henmi, M.

AU - Naito, R.

AU - Tsubaki, K.

AU - Aoki, N.

AU - Bird, J. P.

AU - Ochiai, Y.

PY - 2006

Y1 - 2006

N2 - We report on a remarkable resonance in the differential conductance of long quantum point contacts (QPCs) that is observed as a precursor to regular quantized transport. This effect is increasingly pronounced in longer QPCs, in which the differential conductance may resonantly exceed 2e2/h. From a study of the experimental characteristics of this feature, we suggest that it may be associated with the formation of a well-resolved energy gap that opens dynamically as a result of enhanced many-body interactions in long QPCs.

AB - We report on a remarkable resonance in the differential conductance of long quantum point contacts (QPCs) that is observed as a precursor to regular quantized transport. This effect is increasingly pronounced in longer QPCs, in which the differential conductance may resonantly exceed 2e2/h. From a study of the experimental characteristics of this feature, we suggest that it may be associated with the formation of a well-resolved energy gap that opens dynamically as a result of enhanced many-body interactions in long QPCs.

UR - https://www.scopus.com/pages/publications/33748290181

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DO - 10.1103/PhysRevLett.97.096801

M3 - Article

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SN - 0031-9007

VL - 97

JO - Physical Review Letters

JF - Physical Review Letters

IS - 9

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ER -

Resonantly enhanced nonlinear conductance in long quantum point contacts near pinch-off

Abstract

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