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

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

doi:10.1063/1.4788941

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

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

Research output: Contribution to journal › Article › peer-review

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 language	English
Article number	013708
Number of pages	5
Journal	Review of Scientific Instruments
Volume	84
Issue number	1
DOIs	https://doi.org/10.1063/1.4788941
Publication status	Published - 30 Jan 2013

Keywords

Scanning tunneling microscopy
Aluminium
Magnetic fields
Superconductivity

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10.1063/1.4788941

1.4788941
Copyright 2013, American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Review of Scientific Instruments, Vol 84, Issue 1, and may be found at: http://scitation.aip.org/content/aip/journal/rsi/84/1/10.1063/1.4788941
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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.",

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AB - 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.

KW - Scanning tunneling microscopy

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KW - Magnetic fields

KW - Superconductivity

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

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Keywords

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