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0-pi Transitions in a Superconductor/Chiral Ferromagnet/Superconductor Junction Induced by a Homogeneous Cycloidal Spiral

Thierry Champel ; Tomas Löfwander (Institutionen för mikroteknologi och nanovetenskap, Bionanosystem) ; Matthias Eschrig
Physical Review Letters Vol. 100 (2008), p. 077003.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: chiral ferromagnet, superconductor, quantum phase transition



Denna post skapades 2008-11-05. Senast ändrad 2009-02-16.
CPL Pubid: 77020

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Bionanosystem (2007-2015)

Ämnesområden

Magnetism
Ytor och mellanytor
Supraledning
Mesoskopisk fysik

Chalmers infrastruktur