0-pi Transitions in a Superconductor/Chiral Ferromagnet/Superconductor Junction Induced by a Homogeneous Cycloidal Spiral
Artikel i vetenskaplig tidskrift, 2008

We study the pi phase in a superconductor-ferromagnet-superconductor Josephson junction, with a ferromagnet showing a cycloidal spiral spin modulation with in-plane propagation vector. Our results reveal a high sensitivity of the junction to the spiral order and indicate the presence of 0-pi quantum phase transitions as function of the spiral wave vector. We find that the chiral magnetic order introduces chiral superconducting triplet pairs that strongly influence the physics in such Josephson junctions, with potential applications in nanoelectronics and spintronics.

quantum phase transition

superconductor

chiral ferromagnet

Författare

Thierry Champel

Tomas Löfwander

Chalmers, Teknisk fysik, Elektronikmaterial och system

Matthias Eschrig

Physical Review Letters

Vol. 100 077003-

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