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Josephson current through a precessing spin

Cecilia Holmqvist (Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik) ; Sofian Teber ; Manuel Houzet ; Denis Feinberg ; Mikael Fogelström (Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik)
Journal of Physics: Conference Series Vol. 150 (2009), p. 022027.
[Konferensbidrag, refereegranskat]

A study of the dc Josephson current between two superconducting leads in the presence of a precessing classical spin is presented. The precession gives rise to a time-dependent tunnel potential which not only creates different tunneling probabilities for spin-up and spin- down quasiparticles, but also introduces a time-dependent spin-flip term. In particular, we study the effects of the spin-flip term alone on the Josephson current between two spin-singlet superconductors as a function of precession frequency and junction transparency. The system displays a steady-state solution although the magnitude and nature of the current is indeed affected by the precession frequency of the classical spin.



Denna post skapades 2009-02-24. Senast ändrad 2009-05-13.
CPL Pubid: 90376

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik

Ämnesområden

Supraledning

Chalmers infrastruktur

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