Physics – Condensed Matter – Superconductivity
Scientific paper
2007-03-03
Rev. Sci. Instrum. 78, 073703 (2007).
Physics
Condensed Matter
Superconductivity
6 pages, 9 figures. accepted for publication in Rev. Sci. Instrum
Scientific paper
10.1063/1.2751095
We constructed a dilution-refrigerator (DR) based ultra-low temperature scanning tunneling microscope (ULT-STM) which works at temperatures down to 30 mK, in magnetic fields up to 6 T and in ultrahigh vacuum (UHV). Besides these extreme operation conditions, this STM has several unique features not available in other DR based ULT-STMs. One can load STM tips as well as samples with clean surfaces prepared in a UHV environment to an STM head keeping low temperature and UHV conditions. After then, the system can be cooled back to near the base temperature within 3 hours. Due to these capabilities, it has a variety of applications not only for cleavable materials but also for almost all conducting materials. The present ULT-STM has also an exceptionally high stability in the presence of magnetic field and even during field sweep. We describe details of its design, performance and applications for low temperature physics.
Fukuyama Hidetoshi
Kambara Hiroshi
Matsui Takafumi
Niimi Yasuhiro
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