Nanoscale superconducting properties of amorphous W-based deposits grown with focused-ion-beam

Details Nanoscale superconducting properties of amorphous W-based deposits grown with focused-ion-beam Nanoscale superconducting properties of amorphous W-based deposits grown with focused-ion-beam

2008-05-30

arxiv.org/abs/0805.4720v1

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1088/1367-2630/10/9/093005

We present very low temperature Scanning Tunneling Microscopy and Spectroscopy (STM/S) measurements in W-based amorphous superconducting nanodeposits grown using a metal-organic precursor and focused-ion-beam. The superconducting gap closely follows s-wave BCS theory, and STS images under magnetic fields show a hexagonal vortex lattice whose orientation is related to features observed in the topography through STM. Our results demonstrate that the superconducting properties at the surface of these deposits are very homogeneous, down to atomic scale. This, combined with the huge nanofabrication possibilities of the focused-ion-beam technique, paves the way to use focused-ion-beam to make superconducting circuitry of many different geometries.

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