A 10 mK scanning tunneling microscope operating in ultra high vacuum and high magnetic fields
作者： Markus Etzkorn , Axel Enders , Wolfgang Stiepany , Christian R. Ast , Klaus Kern
DOI: 10.1063/1.4793793
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摘要: We present design and performance of a scanning tunneling microscope (STM) that operates at temperatures down to 10 mK providing ultimate energy resolution on the atomic scale. The STM is attached dilution refrigerator with direct access an ultra high vacuum chamber allowing in situ sample preparation. High magnetic fields up 14 T perpendicular 0.5 parallel surface can be applied. Temperature sensors mounted directly tip position verified base temperature within small error margin. Using superconducting Al metallic Cu(111) sample, we determined effective 38 ± 1 from thermal broadening observed spectra. This results upper limit for ΔE = 3.5 kBT 11.4 0.3 μeV. stability between 4 pm 15 as demonstrated by topography measurements surface.
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