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arXiv 0706.4462cond-mat.dis-nncond-mat.str-el
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一维Wigner玻璃的无序诱导跃迁

Disorder induced transition into a one-dimensional Wigner glass

Shimul Akhanjee, Joseph Rudnick

摘要:

作为强无序效应的后果的准长程晶体秩序的破坏示出伴随着严格的本地化的所有经典等离子体模式的一维维格纳晶体在T=0。我们构建了一个相图,涉及到维格纳晶体的结构相特性的等离子体离域过渡最近报道。在强无序状态的严格局域相的深处,我们观察到“玻璃状”行为。然而,进入具有等离子体迁移率边缘的临界相,系统保持其晶体组成。我们预测,两个阶段之间的过渡发生在相对无序强度的临界值。这种转变有一个实验签名的AC电导率作为一个局部最大的最大光谱振幅的相对无序强度的函数。

英文摘要:

The destruction of quasi-long range crystalline order as a consequence of strong disorder effects is shown to accompany the strict localization of all classical plasma modes of one-dimensional Wigner crystals at T=0. We construct a phase diagram that relates the structural phase properties of Wigner crystals to a plasmon delocalization transition recently reported. Deep inside the strictly localized phase of the strong disorder regime, we observe ``glass-like'' behavior. However, well into the critical phase with a plasmon mobility edge, the system retains its crystalline composition. We predict that a transition between the two phases occurs at a critical value of the relative disorder strength. This transition has an experimental signature in the AC conductivity as a local maximum of the largest spectral amplitude as a function of the relative disorder strength.

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