RT Journal Article
T1 Extremely long-range, high-temperature Josephson coupling across a half-metallic ferromagnet
A1 Sánchez Manzano, David
A1 Cuéllar Jiménez, Fabian Andrés
A1 Cabero Piris, Mariona
A1 Rouco Gómez, Víctor
A1 Orfila Rodríguez, Gloria
A1 Tornos Castillo, Javier
A1 Rivera Calzada, Alberto Carlos
A1 González Calbet, José María
A1 León Yebra, Carlos
A1 Villegas Hernández, Javier Eulogio
A1 Santamaría Sánchez-Barriga, Jacobo
AB The Josephson effect results from the coupling of two superconductors across a spacer such as an insulator, a normal metal or a ferromagnet to yield a phase coherent quantum state. However, in junctions with ferromagnetic spacers, very long-range Josephson effects have remained elusive. Here we demonstrate extremely long-range (micrometric) high-temperature (tens of kelvins) Josephson coupling across the half-metallic manganite La0.7Sr0.3MnO3 combined with the superconducting cuprate YBa2Cu3O7. These planar junctions, in addition to large critical currents, display the hallmarks of Josephson physics, such as critical current oscillations driven by magnetic flux quantization and quantum phase locking effects under microwave excitation (Shapiro steps). The latter display an anomalous doubling of the Josephson frequency predicted by several theories. In addition to its fundamental interest, the marriage between high-temperature, dissipationless quantum coherent transport and full spin polarization brings opportunities for the practical realization of superconducting spintronics, and opens new perspectives for quantum computing.Josephson coupling over micrometres and at tens of kelvins is demonstrated across the half-metallic manganite La0.7Sr0.3MnO3 combined with the superconducting cuprate YBa2Cu3O7.
PB Springer Nature
SN 1476-1122
YR 2022
FD 2022
LK https://hdl.handle.net/20.500.14352/99761
UL https://hdl.handle.net/20.500.14352/99761
LA eng
NO Sanchez-Manzano, D., Mesoraca, S., Cuellar, F.A. et al. Extremely long-range, high-temperature Josephson coupling across a half-metallic ferromagnet. Nat. Mater. 21, 188–194 (2022). https://doi.org/10.1038/s41563-021-01162-5
NO European Commission 
NO Ministerio de Ciencia e Innovación (España) 
NO Université Paris-Saclay
NO Agence Nationale de la Recherche (France)
NO Ministry of Science and Higher Education of the Russian Federation
DS Docta Complutense
RD 7 abr 2025