Very Low Temperature Tunnelling Spectroscopy in the heavy fermion superconductor PrOs${}_4$Sb${}_{12}$

Abstract

We present scanning tunnelling spectroscopy measurements on the heavy fermion superconductor PrOs${}_4$Sb${}_{12}$. Our results show that the superconducting gap opens over a large part of the Fermi surface. The deviations from isotropic BCS s-wave behavior are discussed in terms of a finite distribution of values of the superconducting gap.

arXiv comment4 pages, 4 figures

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• Intrinsic atomic scale modulations of the superconducting gap of 2H-NbSe2
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