We present a scanning force microscope that operates in a dilution refrigerator at temperatures of about 100 mK. We use tuning fork sensors for scanning gate experiments on mesoscopic semiconductor nanostructures. Slip-stick motors allow sample coarse-positioning at base temperature. The construction, thermal anchoring, and a procedure to optimize the settings of the phase-locked loop that we use for sensor control are discussed in detail. We present low-temperature topographic and scanning gate images as examples of successful operation.

Topics
Tuning forks, Coaxial connectors, Heterostructures, Chip carrier, Thermal instruments, Dilution refrigerators, Phase lock loop, Nanowires, Semiconductor nanostructures, Atomic force microscopy
© 2007 American Institute of Physics.
2007
American Institute of Physics
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