3He refrigerator based very low temperature scanning tunneling microscope

S. H. Pan, Eric W. Hudson, J. C. Davis

Research output: Contribution to journalArticle

169 Citations (Scopus)

Abstract

We describe the design and development of a scanning tunneling microscope (STM) which can operate at temperatures down to 240 mK and in magnetic fields up to 7 T with high spatial and energy resolution. The compact and rigid STM head is mounted directly on a low vibration, single shot, 3He refrigerator. This refrigerator can be operated at its base temperature continuously for several days before the 3He needs to be recondensed. The system is equipped with a sample transport manipulator from room temperature, and a cleavage device at low temperature, so that the cryogenic ultrahigh vacuum condition inside the cryostat can be utilized. A superconducting magnet provides a magnetic field of up to 7 T at the sample along the STM tip direction. Test results have shown that, at the base temperature, this instrument has better than 0.5 pm z-direction resolution in imaging mode, and better than 20 μV energy resolution in spectroscopy mode.

Original languageEnglish (US)
Pages (from-to)1459-1463
Number of pages5
JournalReview of Scientific Instruments
Volume70
Issue number2
DOIs
StatePublished - Jan 1 1999

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Refrigerators
refrigerators
Microscopes
microscopes
Scanning
scanning
temperature measuring instruments
cryostats
superconducting magnets
magnetic fields
Temperature
ultrahigh vacuum
shot
cryogenics
manipulators
cleavage
Magnetic fields
spatial resolution
Cryostats
Superconducting magnets

All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

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3He refrigerator based very low temperature scanning tunneling microscope. / Pan, S. H.; Hudson, Eric W.; Davis, J. C.

In: Review of Scientific Instruments, Vol. 70, No. 2, 01.01.1999, p. 1459-1463.

Research output: Contribution to journalArticle

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