Ferromagnetic planar Josephson junction with transparent interfaces: a φ junction proposal.

@article{Heim2013FerromagneticPJ,
  title={Ferromagnetic planar Josephson junction with transparent interfaces: a $\phi$ junction proposal.},
  author={D. M. Heim and N G Pugach and Mikhail Yu. Kupriyanov and Edward Goldobin and Dieter Koelle and Reinhold Kleiner},
  journal={Journal of physics. Condensed matter : an Institute of Physics journal},
  year={2013},
  volume={25 21},
  pages={
          215701
        }
}
  • D. M. Heim, N. Pugach, +3 authors R. Kleiner
  • Published 18 February 2013
  • Physics
  • Journal of physics. Condensed matter : an Institute of Physics journal
We calculate the current-phase relation of a planar Josephson junction with a ferromagnetic weak link located on top of a thin normal metal film. Following experimental observations we assume transparent superconductor-ferromagnet interfaces. This provides the best interlayer coupling and a low suppression of the superconducting correlations penetrating from the superconducting electrodes into the ferromagnetic layer. We show that this Josephson junction is a promising candidate for… 
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References

SHOWING 1-10 OF 27 REFERENCES
Phase diagram of geometric d -wave superconductor Josephson junctions
We show that a constriction-type Josephson junction realized by an epitactic thin film of a d-wave superconductor with an appropriate boundary geometry exhibits intrinsic phase differences between 0…
Thickness dependence of the Josephson ground States of superconductor-ferromagnet-superconductor junctions.
TLDR
The first experimental observation of the two-node thickness dependence of the critical current in Josephson junctions with a ferromagnetic interlayer is reported and a theoretical approach based on the Usadel equations taking into account the spin-flip scattering is developed.
0-pi Josephson tunnel junctions with ferromagnetic barrier.
TLDR
The ground state of the 330 microm (1.3lambda(J)) long junction corresponds to a spontaneous vortex of supercurrent pinned at the 0-pi step and carrying approximately 6.7% of the magnetic flux quantum Phi(0).
Implementation of superconductor/ferromagnet/ superconductor [pi]-shifters in superconducting digital and quantum circuits
Interrupting a superconducting loop with a thin ferromagnetic film creates a so-called π-Josephson junction that shifts the phase of a current flowing in the loop by 180°. A demonstration of the use…
Double proximity effect in hybrid planar superconductor-normal metal/ferromagnet-superconductor structures
We have investigated the differential resistance of hybrid planar Al-(Cu/Fe)-Al submicron bridges at low temperatures and in weak magnetic fields. The structure consists of a Cu/Fe bilayer forming a…
The current-phase relation in Josephson junctions
This review provides a theoretical basis for understanding the current-phase relation (CPhiR) for the stationary (dc) Josephson effect in various types of superconducting junctions. The authors…
Josephson phi-junctions based on structures with complex normal/ferromagnet bilayer
We demonstrate that Josephson devices with a nontrivial phase difference 0 < phivg < π in the ground state can be realized in structures composed of longitudinally oriented normal metal (N) and…
Experimental evidence of a φ Josephson junction.
TLDR
It is demonstrated experimentally the existence of Josephson junctions having a doubly degenerate ground state with an average Josephson phase ψ=±φ, and it is shown that this phase can be set to a particular state by tuning an external magnetic field, or by using a proper bias current sweep sequence.
Josephson junction with a magnetic-field tunable ground state.
TLDR
The behavior of an asymmetric 0-π Josephson junction in an applied magnetic field H is studied and it is demonstrated that H induces an additional term ∝Hcosψ in the effective current-phase relation, resulting in a nontrivial ground state tunable by magnetic field.
Spin polarization of quasiparticle states in S/F structures with a finite transparency of the SF interface
The proximity effect between a massive superconductor (S) and a mesoscopic layer of a normal ferromagnetic metal (F) is investigated for arbitrary transparency of the SF interface and arbitrary value…
...
1
2
3
...