Mapping the surface electrostatic potentials of Au(111) by using barrier-height measurements

Takuro Aoki; Takashi Yokoyama

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Mapping the surface electrostatic potentials of Au(111) by using barrier-height measurements

机译：通过势垒高度测量绘制Au（111）的表面静电势

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The surface electrostatic potential of Au(111) has been evaluated by using site-specific barrier-height measurements in a scanning tunneling microscope. From the spatial variation of the barrier height, sharp enlargement and reduction of the surface potential are obtained at the upper and lower step edges, respectively, which are characterized as the Smoluchowski effect. We also observe the potential with oscillatory decay away from the step, known as the Friedel potential oscillation. In addition, the periodic potential modulation induced by the surface reconstruction is evaluated quantitatively, which is confirmed by the energy shift of the bulk electronic states.

机译：Au（111）的表面静电势已通过在扫描隧道显微镜中使用特定位置的势垒高度测量进行了评估。从势垒高度的空间变化，分别在上和下阶梯边缘获得表面势的急剧增大和减小，这被表征为斯莫卢霍夫斯基效应。我们还观察到振荡衰减远离阶跃的电势，称为Friedel电势振荡。另外，定量地评估了由表面重构引起的周期性电势调制，这由体电子态的能量位移证实。

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来源
《Physical review》 |2014年第15期|155423.1-155423.5|共5页
作者
Takuro Aoki; Takashi Yokoyama;
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作者单位

Department of Nanoscience and Technology, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan;

Department of Nanoscience and Technology, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan;

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正文语种 eng
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scanning tunneling microscopy (including chemistry induced with STM); surface double layers, schottky barriers, and work functions; surface states, band structure, electron density of states;

机译：扫描隧道显微镜（包括用STM诱导的化学反应）;表面双层;肖特基势垒和功函数;表面态;能带结构;态电子密度;

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机译：au（100）和au（111）表面的潜在诱导结构转变

Mapping the surface electrostatic potentials of Au(111) by using barrier-height measurements

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