Superconducting density of states at the border of an amorphous thin film grown by focused-ion-beam

Abstract

We present very low temperature Scanning Tunneling Microscopy and Spectroscopy (STM/S) measurements of a W based amorphous thin film grown with focused-ion-beam. In particular, we address the superconducting properties close to the border, where the thickness of the superconducting film decreases, and the Au substrate emerges. When approaching the Au substrate, the superconducting tunneling conductance strongly increases around the Fermi level, and the quasiparticle peaks do not significantly change its position. Under magnetic fields, the vortex lattice is observed, with vortices positioned very close to the Au substrate.

arXiv commentTo appear in Journal of Physics: Conference series

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Cited by in corpus (3)

• Imaging superconducting vortex core and lattice with the scanning tunneling microscope
• Local density of states around single vortices and vortex pairs: effect of boundaries and hybridization of vortex core states
• Electronic structure of mesoscopic superconducting disk: Quasiparticle tunneling between the giant vortex core and disk edge