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Interplay of ferromagnetism and triplet superconductivity in a Josephson junction

Brydon, P. ; Kastening, Boris ; Morr, Dirk ; Manske, Dirk :
Interplay of ferromagnetism and triplet superconductivity in a Josephson junction.
[Online-Edition: http://dx.doi.org/10.1103/PhysRevB.77.104504]
In: Physical Review B, 77 (10) S. 104504-1. ISSN 1098-0121
[Artikel] , (2008)

Offizielle URL: http://dx.doi.org/10.1103/PhysRevB.77.104504

Kurzbeschreibung (Abstract)

In this work we extend our earlier analysis of the novel Josephson effect in triplet superconductorferromagnet- triplet superconductor �TFT� junctions [�Kastening et al., Phys. Rev. Lett. 96, 047009 (�2006)]��. In our more general formulation of the TFT junction, we allow for potential scattering at the barrier and an arbitrary orientation of the ferromagnetic moment. Several new effects are found upon the inclusion of these extra terms: for example, we find that a Josephson current can flow even when there is vanishing phase difference between the superconducting condensates on either side of the barrier. The critical current for a barrier with magnetization parallel to the interface is calculated as a function of the junction parameters, and is found to display strong nonanalyticities. Furthermore, the Josephson current switches identified in our previous work are found to be robust features of the junction, while the unconventional temperature dependence of the current is very sensitive to the extra terms in the barrier Hamiltonian.

Typ des Eintrags: Artikel
Erschienen: 2008
Autor(en): Brydon, P. ; Kastening, Boris ; Morr, Dirk ; Manske, Dirk
Titel: Interplay of ferromagnetism and triplet superconductivity in a Josephson junction
Sprache: Englisch
Kurzbeschreibung (Abstract):

In this work we extend our earlier analysis of the novel Josephson effect in triplet superconductorferromagnet- triplet superconductor �TFT� junctions [�Kastening et al., Phys. Rev. Lett. 96, 047009 (�2006)]��. In our more general formulation of the TFT junction, we allow for potential scattering at the barrier and an arbitrary orientation of the ferromagnetic moment. Several new effects are found upon the inclusion of these extra terms: for example, we find that a Josephson current can flow even when there is vanishing phase difference between the superconducting condensates on either side of the barrier. The critical current for a barrier with magnetization parallel to the interface is calculated as a function of the junction parameters, and is found to display strong nonanalyticities. Furthermore, the Josephson current switches identified in our previous work are found to be robust features of the junction, while the unconventional temperature dependence of the current is very sensitive to the extra terms in the barrier Hamiltonian.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Physical Review B
Band: 77
(Heft-)Nummer: 10
Verlag: American Physical Society
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Dünne Schichten
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 09 Jan 2013 09:15
Offizielle URL: http://dx.doi.org/10.1103/PhysRevB.77.104504
ID-Nummer: doi:10.1103/PhysRevB.77.104504
Sponsoren: B.K. acknowledges support by DLR �German Aerospace Center�., D.K.M. acknowledges financial support by the Alexander von Humboldt Foundation, the National Science Foundation under Grant No. DMR-0513415, and the U.S. Department of Energy under Grant No. DE-FG02- 05ER46225.
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