Scanning tunneling spectroscopy with superconducting tips of Al

Abstract

We present Scanning Tunneling Spectroscopy measurements at 0.1 K using tips made of Al. At zero field, the atomic lattice and charge density wave of 2HNbSe2 are observed, and under magnetic fields the peculiar electronic surface properties of vortices are precisely resolved. The tip density of states is influenced by the local magnetic field of the vortex, providing for a new probe of the magnetic field at nanometric sizes.

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• Unconventional scanning tunneling conductance spectra for graphene
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• Field dependence of the vortex core size probed by STM
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• In-plane magnetic penetration depth in NbS${}_2$
• Supercurrent on a vortex core in 2H-NbSe${}_2$: current driven scanning tunneling spectroscopy
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• Magnetic Impurities on Superconducting Surfaces: Phase Transitions and the Role of Impurity-Substrate Hybridization
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• Scanning microscopies of superconductors at very low temperatures
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• Anisotropic superconductivity and Fermi surface reconstruction in the spin-vortex antiferromagnetic superconductor CaK(Fe${}_{0.95}$Ni${}_{0.05}$)${}_4$As${}_4$
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