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arXiv 0903.5076cond-mat.mes-hall
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密度调制量子线中的自旋非相干输运

Spin incoherent transport in density-modulated quantum wires

K. M. Liu, H. I. Lin, V. Umansky, S. Y. Hsu

摘要:

研究了量子线中电子输运与密度、温度和磁场的关系。在低温下,载流子密度的降低在第一平台上给出负的电导校正。突出而神秘的“0.7结构”在低密度下更清晰地分辨出来。电导的热行为遵循自旋非相干输运的预测。低密度的0.7结构在较小的面内磁场中下降到$e^2/h$。这些特征与理论预言定性一致,为低密度量子线中存在维格纳晶体提供了证据。

英文摘要:

Density, temperature and magnetic field dependences on electron transport in a quantum wire were studied. Decrease of carrier density gives a negative conductance correction on the first plateau at low temperatures. The prominent and mysterious "0.7 structure" is more clearly resolved at low densities. The thermal behavior of the conductance follows the predictions of the spin-incoherent transport. The 0.7 structure at a low density drops to $e^2/h$ in a smaller in-plane magnetic field. The features are qualitatively consistent with the theoretical predictions and provide evidence for the existence of Wigner Crystal in low density quantum wires.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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