ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
We have constructed a double point-contact system for use at liquid-helium temperatures which is adjustable from the outside. Both point-contact wires can be independently displaced vertically with a travel of 5 mm and horizontally with a travel of 4 mm. Displacements of 5 μm can be achieved. The sample table is rotatable over 360° and can be translated over 2 mm, which implies that point-contact wires can be placed at any desired position of a sample. Moreover, the point-contact wires and the sample can be viewed from the outside to check positions and a magnetic field up to 1.2 T can be applied. The point contacts obtained with this system are both mechanically and electrically stable, also in a magnetic field. The instrument is of great use for transverse electron focusing studies of transport properties of metals, surfaces, and interfaces. Because of versatility, the instrument is also suitable for single point-contact experiments to study interfaces of normal metals and superconductors or to perform point-contact spectroscopy experiments.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1140984
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