Shifting the Voltage Drop in Electron Transport Through a Single Molecule.
Shifting the Voltage Drop in Electron Transport Through a Single Molecule.
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DOI：
10.1103/physrevlett.115.016802
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发表时间：
2015-06
影响因子：
8.6
通讯作者：
S. Karan;D. Jacob;M. Karolak;C. Hamann;Yongfeng Wang;A. Weismann;A. Lichtenstein;R. Berndt
中科院分区：
文献类型：
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作者：
S. Karan;D. Jacob;M. Karolak;C. Hamann;Yongfeng Wang;A. Weismann;A. Lichtenstein;R. Berndt
在低温扫描隧道显微镜（STM）下，研究了一种mn -卟啉与Au（111）的接触。根据多体计算，微分电导谱显示由于未屏蔽近藤效应而产生的零偏置共振。当STM尖端与Mn中心接触时，光谱沿电压轴呈现反转。分子的静电势的剧烈变化，包括一个小的几何弛豫，被发现引起这种观察。
A Mn-porphyrin was contacted on Au(111) in a low-temperature scanning tunneling microscope (STM). Differential conductance spectra show a zero-bias resonance that is due to an underscreened Kondo effect according to many-body calculations. When the Mn center is contacted by the STM tip, the spectrum appears to invert along the voltage axis. A drastic change in the electrostatic potential of the molecule involving a small geometric relaxation is found to cause this observation.