Construction and performance of a dilution-refrigerator based spectroscopic-imaging scanning tunneling microscope

Udai Raj Singh, Mostafa Enayat, Seth C. White, Peter Wahl

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35 Citations (Scopus)
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Abstract

We report on the set-up and performance of a dilution-refrigerator based spectroscopic imaging scanning tunneling microscope. It operates at temperatures below 10 mK and in magnetic fields up to 14T. The system allows for sample transfer and in situ cleavage. We present first-results demonstrating atomic resolution and the multi-gap structure of the superconducting gap of NbSe2 at base temperature. To determine the energy resolution of our system we have measured a normal metal/vacuum/superconductor tunneling junction consisting of an aluminum tip on a gold sample. Our system allows for continuous measurements at base temperature on time scales of up to ≈170 h.
Original languageEnglish
Article number013708
Number of pages5
JournalReview of Scientific Instruments
Volume84
Issue number1
DOIs
Publication statusPublished - 30 Jan 2013

Keywords

  • Scanning tunneling microscopy
  • Aluminium
  • Magnetic fields
  • Superconductivity

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