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Electronic Properties Of (co, Ag) Self-organized Nano Dots On Au(111) Vicinal Surfaces

机译:(co,Ag)自组织纳米点在Au(111)邻面上的电子性质

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Electronic properties of (Ag, Co) nanostructures grown on Au( 111) vicinal surfaces have been studied by angle resolved photoemission spectroscopy (ARPES), scanning tunneling microscopy and spectroscopy (STM/STS). The growth and self-assembling of Co and Ag nano dots on Au(788) surface are described. Co island growth leads to the formation of repulsive energy barriers for the surface state, and subsequently to the appearance of confined states in between each group of four Co dots. On the contrary, when Ag nano dots are grown, the potential barrier for the surface electrons is not enough to suppress their dispersive behavior. Nevertheless, inside Ag islands appear new quantized states whose energies can be tailored by varying the deposition rate of the adsorbate and/or the Miller index of the vicinal surfaces. In both systems, high homogeneity of the electronic properties is achieved over a macroscopic scale.
机译:通过角分辨光发射光谱法(ARPES),扫描隧道显微镜和光谱法(STM / STS)研究了在Au(111)毗连表面上生长的(Ag,Co)纳米结构的电子性质。描述了Au(788)表面上Co和Ag纳米点的生长和自组装。 Co岛的生长导致形成表面状态的排斥能垒,随后导致在每组四个Co点之间出现受限状态。相反,当生长Ag纳米点时,表面电子的势垒不足以抑制其分散行为。然而,在银岛内部会出现新的量化状态,其能量可以通过改变被吸附物的沉积速率和/或邻近表面的米勒指数来调整。在两个系统中,在宏观尺度上都实现了电子特性的高度均一性。

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