Proximity effect and strong coupling superconductivity in nanostructures built with an STM

Details Proximity effect and strong coupling superconductivity in nanostructures built with an STM Proximity effect and strong coupling superconductivity in nanostructures built with an STM

2001-11-20

arxiv.org/abs/cond-mat/0111365v1

Physics

Condensed Matter

Superconductivity

4 figures, 4 pages

Scientific paper

10.1103/PhysRevB.65.100519

We present high resolution tunneling spectroscopy data at very low temperatures on superconducting nanostructures of lead built with an STM. By applying magnetic fields, superconductivity is restricted to length scales of the order of the coherence length. We measure the tunneling conductance and analyze the phonon structure and the low energy DOS. We demonstrate the influence of the geometry of the system on the magnetic field dependence of the tunneling density of states, which is gapless in a large range of fields. The behavior of the features in the tunneling conductance associated to phonon modes are explained within current models.

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