Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 15: STM/AFM: New Approaches
O 15.13: Vortrag
Montag, 7. März 2016, 18:15–18:30, H24
Scanning Tunneling Microscopy at 20 mK — •Timofey Balashov, Michael Meyer, and Wulf Wulfhekel — Physikalisches Institut, KIT, Karlsruhe, Germany
We present a compact experimental setup for scanning tunneling microscopy and spectroscopy at 20 mK. To achieve this temperature, the microscope is mounted in a bath cryostat containing a 3He/4He dilution system. High mechanical stability and low electronic noise ensure a high energy resolution below 50 µeV. Additional capabilities include a 6 T axial magnetic field, quick tip and sample exchange and deposition of materials at low temperatures.
The high energy resolution enables precise measurements of complicated electronic systems and inelastic excitations. To demonstrate the capabilities of the instrument, we show measurements of magnetic excitations of Fe atoms on Pt(111).