About the Authors

Antonella Liccardo

Affiliations Physics Department, Università degli Studi di Napoli “Federico II”, Napoli, Italy, Istituto Nazionale Fisica Nucleare (INFN) - Sezione di Napoli, Napoli, Italy

Annalisa Fierro

annalisa.fierro@spin.cnr.it

Affiliations Physics Department, Università degli Studi di Napoli “Federico II”, Napoli, Italy, Consiglio Nazionale delle Ricerche (CNR) - Institute Superconductors, oxides and other innovative materials and devices (SPIN), Napoli, Italy

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AL AF. Performed the experiments: AL AF. Analyzed the data: AL AF. Contributed reagents/materials/analysis tools: AL AF. Wrote the paper: AL AF.