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arXiv 1808.06246cond-mat.mes-hall
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量子Wigner晶体形成的临界填充因子

Critical Filling Factor for the Formation of a Quantum Wigner Crystal Screened by a Nearby Layer

H. Deng, L. W. Engel, L. N. Pfeiffer, K. W. West, K. W. Baldwin, M. Shayegan

摘要:

相互作用的电子系统中最吸引人的基态之一是所谓的维格纳晶体,其中的电子为了使它们的库仑排斥能最小化,形成了一个有序的阵列。在这里,我们报告的临界填充因子($ν_{C}$)的测量值低于磁场诱导,量子维格纳晶体的形式在一个稀的,二维的电子层时,第二个,高密度的电子层是存在于紧密的接近。数据表明,维格纳晶体形式在一个显着更小的$ν_{C}$相比,$ν_{C}$($\simeq 0.20$)在单层二维电子系统。测得的$ν_{C}$表现出强烈的依赖于层间距离,反映了相互作用和屏蔽从相邻的,高密度层。

英文摘要:

One of the most fascinating ground states of an interacting electron system is the so-called Wigner crystal where the electrons, in order to minimize their repulsive Coulomb energy, form an ordered array. Here we report measurements of the critical filling factor ($ν_{C}$) below which a magnetic-field-induced, quantum Wigner crystal forms in a dilute, two-dimensional electron layer when a second, high-density electron layer is present in close proximity. The data reveal that the Wigner crystal forms at a significantly smaller $ν_{C}$ compared to the $ν_{C}$ ($\simeq 0.20$) in single-layer two-dimensional electron systems. The measured $ν_{C}$ exhibits a strong dependence on the interlayer distance, reflecting the interaction and screening from the adjacent, high-density layer.

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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