arxiv: cond-mat/0604019 · v2 · pith:4IPOSDKYnew · submitted 2006-04-02 · ❄️ cond-mat.mes-hall

Shot-Noise Signatures of 0.7 Structure and Spin in a Quantum Point Contact

L. DiCarlo , Y. Zhang , D. T. McClure , D. J. Reilly , C. M. Marcus , L. N. Pfeiffer , K. W. West This is my paper

classification ❄️ cond-mat.mes-hall

keywords fieldnoiseasymmetrycontactpointquantumshotstructure

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We report simultaneous measurement of shot noise and dc transport in a quantum point contact as a function of source-drain bias, gate voltage, and in-plane magnetic field. Shot noise at zero field exhibits an asymmetry related to the 0.7 structure in conductance. The asymmetry in noise evolves smoothly into the symmetric signature of spin-resolved electron transmission at high field. Comparison to a phenomenological model with density-dependent level splitting yields good quantitative agreement.

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Shot-Noise Signatures of 0.7 Structure and Spin in a Quantum Point Contact

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