典型文献
Measuring fine molecular structures with luminescence signal from an alternating current scanning tunneling microscope
文献摘要：
In scanning tunneling microscopy-induced luminescence(STML),the photon count is measured to reflect single-molecule properties,e.g.,the first molecular excited state.The energy of the first excited state is typically shown by a rise of the photon count as a function of the bias voltage between the tip and the substrate.It remains a challenge to determine the precise rise position of the current due to possible experimental noise.In this work,we propose an alternating current version of STML to resolve the fine structures in the photon count measurement.The measured photon count and the current at the long-time limit show a sinusoidal oscillation.The zero-frequency component of the current shows knee points at the precise voltage as the fraction of the detuning between the molecular gap and the DC component of the bias voltage.We propose to measure the energy level with discontinuity of the first derivative of such a zero-frequency component.The current method will extend the application of STML in terms of measuring molecular properties.
文献关键词：
中图分类号：
作者姓名：
Fei Wen;Guohui Dong;Hui Dong
作者机构：
Graduate School of China Academy of Engineering Physics,Beijing 100084,China;School of Physics and Electronic Engineering,Sichuan Normal University,Chengdu 610068,China
文献出处：
引用格式：
[1]Fei Wen;Guohui Dong;Hui Dong-.Measuring fine molecular structures with luminescence signal from an alternating current scanning tunneling microscope)[J].理论物理,2022(12):52-61
A类：
STML
B类：
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AB值：
0.496584
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