Symmetries of Pairing Correlations in Superconductor–Ferromagnet Nanostructures
By M. Eschrig, T. Löfwander, T. Champel, J. C. Cuevas, J. Kopu, G. Schön. 2006
144 citations recorded by the source corpus.
Using selection rules imposed by the Pauli principle, we classify pairing correlations according to their symmetry properties with respect to spin, momentum, and energy. We observe that inhomogeneity always leads to mixing of even- and odd-energy pairing components. We investigate the superconducting pairing correlations present near interfaces between superconductors and ferromagnets, with focus on clean systems consisting of singlet superconductors and either weak or half-metallic ferromagnets. Spin-active scattering in the interface region induces all of the possible symmetry components. In particular, the long-range equal-spin pairing correlations have odd-frequency s-wave and even-frequency p-wave components of comparable magnitudes. We also analyze the Josephson current through a half-metal. We find analytic expressions and a universality in the temperature dependence of the critical current in the tunneling limit.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/6c2ea9c28daa9c9517d85fad50c3db648e9eabda
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In Condensed Matter Physics
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Triplet supercurrents in clean and disordered half-metallic ferromagnets (2006, background): “The four symmetry types of Cooper pairs allowed by the Pauli exclusion principle [6, 7] are listed in Table I.”
- Odd-frequency superconductivity (2017, methodology): “(131) The value of the unknown coefficients {A±,B±,Cσσ,Dσσ} are determined by the boundary conditions of the system (Cottet et al., 2009, 2011; Eschrig et al., 2015; Kupriyanov and Lukichev, 1988; Nazarov, 1999).”