期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 84, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4801458
关键词
-
资金
- Deutsche Forschungsgemeinschaft (DFG) [SFB 616]
- Studienstiftung des Deutschen Volkes
The paper describes a simple scheme enabling the real-time characterization of fluctuations, e.g., of the conductance in scanning tunneling microscopy. The technique can be used in parallel to other data acquisition, evaluating the rate, the amplitude, and the duty cycle of telegraphic noise in the tunneling current. This kind of scanning probe microscopy allows to evaluate the noise parameters as a function of the average tunneling current, the electron energy, and the lateral position. Images of the noise with Angstrom spatial resolution are acquired simultaneously to the topographic information providing a direct correlation between the structural information and the noise. The method can be applied to a large variety of systems to monitor dynamics on the nanoscale, e.g., the localization of tunneling current induced switching within a single molecule. Noise spectroscopy may reveal the involved molecular orbitals, even if they cannot be resolved in standard scanning tunneling spectroscopy. As an example we present experimental data of the organic molecule copper phthalocyanine on a Cu(111) surface [J. Schaffert, M. C. Cottin, A. Sonntag, H. Karacuban, C. A. Bobisch, N. Lorente, J.-P. Gauyacq, and R. Moller, Nature Mater. 12, 223-227 (2013)]. (C) 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4801458]
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据