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arXiv · cond-mat/9907379

Spin-dependent transport in a clean one-dimensional channel

C. -T. Liang·M. Y. Simmons·C. G. Smith·G. H. Kim·D. A. Ritchie·M. Pepper
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Abstract

A shoulder-like feature close to $(0.7\times 2e^{2}/h)$, "the 0.7 structure" at zero magnetic field was observed in clean one-dimensional (1D) channels [K.J. Thomas et al., Phys. Rev. Lett. 77, 135 (1996)]. To provide further understanding of this structure, we have performed low-temperature measurements of a novel design of 1D channel with overlaying finger gates to study the 0.7 structure as a function of lateral confinement strength and potential profile. We found that the structure persists when the lateral confinement strength is changed by a factor of 2. We have also shown that the 0.7 structure present in two 1D channels in series behaves like a single 1D channel which shows the 0.7 structure, demonstrating that the 0.7 structure is not a transmission effect through a ballistic channel at zero in-plane magnetic field.

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C. -T. Liang, M. Y. Simmons, C. G. Smith, G. H. Kim, D. A. Ritchie, M. Pepper. 1999-07-24. Spin-dependent transport in a clean one-dimensional channel. https://doi.org/10.1103/physrevb.60.10687

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