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arXiv 0907.1634cond-mat.mes-hallcond-mat.str-el
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弱约束量子线中电子晶格的初始形成

Incipient Formation of an Electron Lattice in a Weakly-Confined Quantum Wire

W. K. Hew, K. J. Thomas, M. Pepper, I. Farrer, D. Anderson, G. A. C. Jones, D. A. Ritchie

摘要:

本文研究了GaAs/AlGaAs异质结中,采用分裂栅和顶栅相结合的方法,改变量子线的限制强度V_conf和载流子密度n_1D时量子线的低温输运性质。在V_conf和n_1D的中间值时,我们观察到电导跃变到4e^2/h,表明存在双线。当n_1D进一步降低时,在2e^2/h处恢复平稳状态。我们的结果表明,在相互作用的准一维量子线的电子晶格的形成的开始。在存在面内磁场的情况下,两条线的自旋对准能级的混合产生更复杂的状态。

英文摘要:

We study the low-temperature transport properties of 1D quantum wires as the confinement strength V_conf and the carrier density n_1D are varied using a combination of split gates and a top gate in GaAs/AlGaAs heterostructures. At intermediate V_conf and n_1D, we observe a jump in conductance to 4e^2/h, suggesting a double wire. On further reducing n_1D, plateau at 2e^2/h returns. Our results show beginnings of the formation of an electron lattice in an interacting quasi-1D quantum wire. In the presence of an in-plane magnetic field, mixing of spin-aligned levels of the two wires gives rise to more complex states.

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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