Robust, carbon related, superconducting nanostructure at the apex of a tungsten STM tip

Robust carbon relatedRobust, carbon related, superconducting nanostructure at the apex of a tungsten STM tip.
C. G. Ayani, F. Calleja, P. Casado Aguilar, et al.

Applied Physics Letters 115, 073108 (2019)