Newly developed low-temperature scanning tunneling microscope and its application to the study of superconducting materials
| Autor: | Qiansheng Yang, Zengbo Chen, Chunli Bai, Fan Gao, Hongjie Tao, Changchun Dai, Guizhen Huang, Zhongxian Zhao, Bo Yin |
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| Rok vydání: | 1994 |
| Předmět: |
Microscope
Materials science business.industry General Engineering Spin polarized scanning tunneling microscopy Nanotechnology Atmospheric temperature range Electrochemical scanning tunneling microscope law.invention law Optoelectronics Vacuum chamber Thin film Scanning tunneling microscope business Quantum tunnelling |
| Zdroj: | Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures. 12:1708 |
| ISSN: | 0734-211X |
| DOI: | 10.1116/1.587582 |
| Popis: | A newly developed scanning tunneling microscope (STM) capable of operating at room temperature, 77 K, and 4.2 K is presented. This compact STM has a highly symmetric and rigid tunneling unit designed as an integral frame except the coarse and fine adjustment parts. The tunneling unit is incorporated into a small vacuum chamber that is usually pumped down to 2×10−4 Pa to avoid water contamination. The fine mechanic adjustment makes the tip approach the sample in 5 nm steps. The coarse adjustment not only changes the distance between the tip and the sample, but also adjusts the tip to be normal to the surface of the sample. With this low‐temperature STM atomic resolution images of Bi‐2212 single‐crystal and large‐scale topographies of a YBa2Cu3O7 thin film are observed at 77 K. |
| Databáze: | OpenAIRE |
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