Triplet superconducting correlations in oxide heterostructures with a composite ferromagnetic interlayer
Journal article, 2013
The superconducting current induced by the penetration of the long-range triplet component of superconducting correlations into a composite ferromagnetic interlayer has been detected in mesa-heterostructures based on oxide cuprate superconductors YBa2Cu3O7 - delta and Au/Nb bilayer films with the composite oxide interlayer that is made of ferromagnetic films of manganite La0.7Sr0.3MnO3 and ruthenate SrRuO3 and has a thickness much larger than the length of correlations determined by the exchange field. The deviation of the superconducting current in the mesa-heterostructure with the fraction of the second harmonic of 13% from a sinusoidal current-phase relation has been detected; this deviation can also be due to the generation of the triplet component of superconducting correlations in the ferromagnet.
thin-films
Author
Gennady Ovsyannikov
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
A. E. Sheyerman
National Research University of Electronic Technology (MIET)
Moscow Institute of Physics and Technology
A. V. Shadrin
Chalmers University of Technology
National Research University of Electronic Technology (MIET)
Yu V. Kislinskiǐ
National Research University of Electronic Technology (MIET)
K. Y. Constantinian
National Research University of Electronic Technology (MIET)
Alexei Kalaboukhov
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
JETP Letters
0021-3640 (ISSN) 1090-6487 (eISSN)
Vol. 97 3 145-148Subject Categories (SSIF 2011)
Physical Sciences
DOI
10.1134/s0021364013030089