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arXiv math-ph/9903014math-phcond-mat.mes-hallmath.MP
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量子Hall哈密顿算子边缘态的扩展性质

On the extended nature of edge states of Quantum Hall Hamiltonians

J. Froehlich, G. M. Graf, J. Walcher

摘要:

本文研究了二维电子气边界附近局域的单粒子量子霍尔哈密顿量的本征态--边缘态的性质。对于有限的样本,它示出的边缘状态与能量在适当的范围之间的朗道水平保持沿边界延伸的少量的障碍的存在下,在这个意义上说,他们携带一个非零的手征边缘电流。对于被限制在半平面内的二维电子气,应用正电子子的Berrere理论证明了在朗道能级之间的能谱的绝对连续性,对应于边缘态.

英文摘要:

Properties of eigenstates of one-particle Quantum Hall Hamiltonians localized near the boundary of a two-dimensional electron gas - so-called edge states - are studied. For finite samples it is shown that edge states with energy in an appropriate range between Landau levels remain extended along the boundary in the presence of a small amount of disorder, in the sense that they carry a non-zero chiral edge current. For a two-dimensional electron gas confined to a half-plane, the Mourre theory of positive commutators is applied to prove absolute continuity of the energy spectrum well in between Landau levels, corresponding to edge 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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