Physics – Condensed Matter – Superconductivity
Scientific paper
2005-10-18
Rev. Sci. Instrum. 77, 023905 (2006)
Physics
Condensed Matter
Superconductivity
7 Pages, 7 figures, typeset in LaTeX, submitted to Rev. Sci. Instrum
Scientific paper
10.1063/1.2168670
A technique for point-contact spectroscopy, based on an electro-mechanical mechanism for the contact formation, has been developed. It is designed to be used in both $^4$He and $^3$He cryostats. The performance has been demonstrated by conductance measurements on various kinds of superconductors, including the conventional superconductor Nb, the two-band superconductor MgB$_2$, and the heavy-fermion superconductor CeCoIn$_5$. Characteristic conductance spectra obtained prove this technique is useful for the investigation of the superconducting order parameter. Advantages of this technique such as its simplicity and versatility are described.
Greene Laura H.
Park Wan Kyu
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