| 扫描隧道显微术中的微分谱学及其应用 |
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| 引用本文： | 王炜华,王兵,侯建国.扫描隧道显微术中的微分谱学及其应用[J].物理,2006,35(1):27-33. |
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| 作者姓名： | 王炜华 王兵 侯建国 |
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| 作者单位： | 中国科学技术大学合肥微尺度物质科学国家实验室(筹),合肥,230026 |
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| 摘 要： | 文章介绍了扫描隧道显微术中微分谱学的原理及其在实验中的诸多应用。微分谱（dI／dV谱）和dI／dV成像可用来研究电子局域态密度在能量和空间的分布，即微分谱固定空间一点，反映电子态密度以能量为变量的分布；而dI／dV图像则反映某给定能量的电子局域态密度以空间为变量的分布，二次微分谱（d^2I／dV^2谱）和二次微分成像可以用来反映分子的非弹性隧穿过程，从而研究分子的振动态。
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| 关 键 词： | 扫描隧道显微术 微分谱学 表面及纳米结构的电子态 电子非弹性隧穿 分子振动模 |
| 收稿时间： | 2005-06-23 |
| 修稿时间： | 2005-06-232005-08-15 |
Differential spectroscopy and its application of scanning tunneling microscopy |
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| WANG Wei-Hua,WANG Bing,HOU Jian-Guo.Differential spectroscopy and its application of scanning tunneling microscopy[J].Physics,2006,35(1):27-33. |
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| Authors: | WANG Wei-Hua WANG Bing HOU Jian-Guo |
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| Institution: | Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | This review gives an introduction to the principle and applications of the differential spectroscopy technique in scanning tunnelling microscopy.The differential(dI/dV) spectroscopy and dI/dV mapping are used to reveal the distributions of electronic local density of states(LDOS) in energy and space,respectively.The differential spectroscopy reveals the distribution of LDOS at different energy levels of a certain position,while the dI/dV mapping reveals the spatial distribution of LDOS at a certain energy window.The quadratic differential(d~2I/dV~2) spectroscopy and d~2I/dV~2 mapping are used to study the inelastic electron tunneling,so that molecular vibrational modes can be studied. |
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| Keywords: | nanostrcutures scanning tunneling microscopy differential spectroscopy density of states of surfaces and inelastic electron tunneling molecular vibrational modes |
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