Unconventional long range triplet proximity effect in planar YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>/La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub>/YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub> Josephson junctions - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Superconductor Science and Technology Année : 2023

Unconventional long range triplet proximity effect in planar YBa2Cu3O7/La0.7Sr0.3MnO3/YBa2Cu3O7 Josephson junctions

David Sanchez-Manzano
S Mesoraca
  • Fonction : Auteur
F Cuellar
  • Fonction : Auteur
M Cabero
  • Fonction : Auteur
S Rodriguez-Corvillo
  • Fonction : Auteur
V Rouco
  • Fonction : Auteur
F Mompean
  • Fonction : Auteur
M Garcia-Hernandez
J M Gonzalez-Calbet
  • Fonction : Auteur
C Feuillet-Palma
N Bergeal
  • Fonction : Auteur
J Lesueur
C Leon
J Santamaria

Résumé

The proximity effect between superconductors and ferromagnets may become long range due to the generation of triplet pairs. The recent finding of a long, one micron-range unconventional Josephson effect between YBa 2 Cu 3 O 7 high Tc cuprates separated by a half metallic La 0.7 Sr 0.3 MnO 3 manganite ferromagnet has uncovered a novel unconventional triplet proximity effect. In this paper, we examine the temperature dependence of the critical current in planar Josephson junctions. We find that the critical current-normal resistance product follows the predictions of traditional superconductor-normal metal-superconductor junctions, which implies that triplet pairs in a ferromagnet are transported in the diffusive limit similarly to singlet pairs in a normal metal. This result calls for theoretical studies of the new triplet Josephson effect and underlines its potential in future superconducting spintronics.
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hal-04303227 , version 1 (23-11-2023)

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David Sanchez-Manzano, S Mesoraca, F Cuellar, M Cabero, S Rodriguez-Corvillo, et al.. Unconventional long range triplet proximity effect in planar YBa2Cu3O7/La0.7Sr0.3MnO3/YBa2Cu3O7 Josephson junctions. Superconductor Science and Technology, 2023, 36 (7), pp.074002. ⟨10.1088/1361-6668/accb11⟩. ⟨hal-04303227⟩
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