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Physical Review Letters, volume 110, issue 11, publication number 117003

Singlet-Triplet Conversion and the Long-Range Proximity Effect in Superconductor-Ferromagnet Structures with Generic Spin Dependent Fields

Publication typeJournal Article
Publication date2013-03-14
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor8.6
ISSN00319007, 10797114
General Physics and Astronomy
Abstract
The long-range proximity effect in superconductor/ferromagnet (S/F) hybrid nano-structures is observed if singlet Cooper pairs from the superconductor are converted into triplet pairs which can diffuse into the fer- romagnet over large distances. It is commonly believed that this happens only in the presence of magnetic inhomogeneities. We show that there are other sources of the long-range triplet component (LRTC) of the con- densate and establish general conditions for their occurrence. As a prototypical example we consider first a system where the exchange field and spin-orbit coupling can be treated as time and space components of an effective SU(2) potential. We derive a SU(2) covariant diffusive equation for the condensate and demonstrate that an effective SU(2) electric field is responsible for the long-range proximity effect. Finally, we extend our analysis to a generic ferromagnet and establish a universal condition for the LRTC. Our results open a new avenue in the search for such correlations in S/F structures and make a hitherto unknown connection between the LRTC and Yang-Mills electrostatics.

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Bergeret F. et al. Singlet-Triplet Conversion and the Long-Range Proximity Effect in Superconductor-Ferromagnet Structures with Generic Spin Dependent Fields // Physical Review Letters. 2013. Vol. 110. No. 11. 117003
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Bergeret F., Tokatly I. Singlet-Triplet Conversion and the Long-Range Proximity Effect in Superconductor-Ferromagnet Structures with Generic Spin Dependent Fields // Physical Review Letters. 2013. Vol. 110. No. 11. 117003
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RIS Copy
TY - JOUR
DO - 10.1103/PhysRevLett.110.117003
UR - https://doi.org/10.1103/PhysRevLett.110.117003
TI - Singlet-Triplet Conversion and the Long-Range Proximity Effect in Superconductor-Ferromagnet Structures with Generic Spin Dependent Fields
T2 - Physical Review Letters
AU - Bergeret, F.S.
AU - Tokatly, I.V.
PY - 2013
DA - 2013/03/14
PB - American Physical Society (APS)
IS - 11
VL - 110
SN - 0031-9007
SN - 1079-7114
ER -
BibTex
Cite this
BibTex Copy
@article{2013_Bergeret,
author = {F.S. Bergeret and I.V. Tokatly},
title = {Singlet-Triplet Conversion and the Long-Range Proximity Effect in Superconductor-Ferromagnet Structures with Generic Spin Dependent Fields},
journal = {Physical Review Letters},
year = {2013},
volume = {110},
publisher = {American Physical Society (APS)},
month = {mar},
url = {https://doi.org/10.1103/PhysRevLett.110.117003},
number = {11},
doi = {10.1103/PhysRevLett.110.117003}
}
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