Versatile scanning tunneling microscopy with 120ps time resolution
We describe a fully ultra-high vacuum compatible scanning tunneling microscope (STM) optimized for radio-frequency signals. It includes in-situ exchangeable tips adapted to high frequency cabling and a standard sample holder, which offer access to the whole range of samples typically investigated by...
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| Veröffentlicht in: | arXiv.org 2013-02 |
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| creator | Saunus, Christian Jan Raphael Bindel Pratzer, Marco Morgenstern, Markus |
| description | We describe a fully ultra-high vacuum compatible scanning tunneling microscope (STM) optimized for radio-frequency signals. It includes in-situ exchangeable tips adapted to high frequency cabling and a standard sample holder, which offer access to the whole range of samples typically investigated by STM. We demonstrate a time resolution of 120 ps using the nonlinear I(V)-characteristic of the surface of highly oriented pyrolithic graphite. We provide atomically resolved images in pulse mode related to a spatially varying nonlinearity of the local density of states of the sample, thus, demonstrating the possible spatial resolution of the instrument in pulse mode. Analysis of the noise reveals that changes in the tunneling junction of 50 pA are dynamically detectable at 120 ps time resolution. |
| doi_str_mv | 10.48550/arxiv.1302.6522 |
| format | Article |
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| subjects | Emissions testing High vacuum Nonlinearity Physics - Instrumentation and Detectors Physics - Mesoscale and Nanoscale Physics Radio signals Sample holders Scanning tunneling microscopy Spatial resolution |
| title | Versatile scanning tunneling microscopy with 120ps time resolution |
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