Open AccessA Compact and Versatile Scanning Tunnelling Microscope with High Energy Resolution for Use in a 3He Cryostat
Author(s) -
Christian Debuschewitz,
Florian Münstermann,
V. Kunej,
Elke Scheer
Publication year - 2007
Publication title -
journal of low temperature physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.598
H-Index - 67
eISSN - 1573-7357
pISSN - 0022-2291
DOI - 10.1007/s10909-007-9332-y
Subject(s) - cryostat , superconductivity , materials science , mesoscopic physics , microscope , condensed matter physics , magnetic field , aluminium , resolution (logic) , scanning tunneling microscope , quantum tunnelling , optoelectronics , optics , nanotechnology , physics , metallurgy , artificial intelligence , computer science , quantum mechanics
We present a simple design for a very-low temperature STM for the investigation of mesoscopic superconductors. The nonmagnetic microscope operates in a conventional 3He cryostat at T = 240 mK and in magnetic fields up to B = 1 T. Efficient filtering of all electrical lines at base temperature results in a voltage resolution ≈ 20μ V, which has been tested by measuring the differential conductance of superconducting aluminium. The successful operation in magnetic field is demonstrated by spectroscopy on superconducting aluminium as well as by demonstrating atomic resolution of HOPG.
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