无限制的离散电子子带：分子边缘的布拉格散射
Discrete Electronic Sub-bands without Confinement: Bragg Scattering at Molecular Edges
摘要：
纳米尺寸固体系统的电子结构的离散化，由于量子限制和随之而来的修改其物理性质是纳米科学和纳米技术的发展的基石之一。在这封信中，我们证明了铜（111）表面态电子的布拉格散射的周期性排列的四氰基醌二甲烷（TCNQ）分子在自组装分子岛的边缘，离散的电子动量的可能值平行于岛的边缘。因此，电子结构由离散数量的子带组成，这些子带出现在非封闭空间中，因此没有量子限制。
英文摘要：
The discretization of the electronic structure of nanometer-size solid systems due to quantum confinement and the concomitant modification of their physical properties is one of the cornerstones for the development of Nanoscience and Nanotechnology. In this letter we demonstrate that Bragg scattering of Cu(111) surface state electrons by the periodic arrangement of tetracyanoquinodimethane (TCNQ) molecules at the edges of self-assembled molecular islands, discretizes the possible values of the electron momentum parallel to the island edge. The electronic structure consists thus of a discrete number of sub-bands which occur in a non-closed space and, therefore, without quantum confinement.
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