| Autor: |
Ayani, C. G., Calleja, F., Casado Aguilar, P., Norris, A., Navarro, J. J., Garnica, M., Acebrón, M., Granados, D., Vázquez de Parga, A. L., Rodrigo, J. G., Miranda, R. |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 8/12/2019, Vol. 115 Issue 7, pN.PAG-N.PAG, 4p, 3 Graphs |
| Abstrakt: |
By pulsing the tunneling voltage between the Tungsten (W) tip of a Scanning Tunneling Microscope (STM) and a graphene-covered metal surface, a superconducting (SC) nanostructure is formed at the apex of the STM tip. We have characterized the SC properties of the resulting nanotip as a function of temperature and magnetic field, obtaining a transition temperature of 3.3 K and a critical field well above 3 T. The SC nanotip is robust and stable and achieves atomic resolution. A non-SC tip can be easily recovered by controlled voltage pulsing on a clean metal surface. The present result should be taken into account when studying zero-bias features like Kondo resonances, zero-bias-conductance peaks, or superconductivity on graphene-based systems by means of STM using tungsten tips. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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