Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 7: Superconductivity & Solids At Low Temperature - Poster Session
TT 7.33: Poster
Montag, 27. März 2006, 14:00–17:45, P1
Spin-Orbit Coupling Effects In The 3-Kelvin Phase Of Sr2RuO4 — •Florian Loder — Experimentalphysik VI, Universität Augsburg, D-86135 Augsburg
The inhomogeneous superconducting phase in the Sr2RuO4, called 3-Kelvin phase, has been shown to occur at interfaces between the bulk material and µm-size Ru-inclusions. It has been proposed that the interface region would be characterized by the strain-induced RuO6 octahedra rotation around the c-axis. Here we show that this gives rise to a staggered antisymmetric spin-orbit coupling which in a homogeneous magnetic field induces both a uniform and a staggered spin component. This spin-orbit coupling influences the superconducting spin-triplet phase nucleating at the interface. A particularly interesting aspect is the possibility to induce a quasi particle gap in Q→ = (π,π,0) -nested Fermi surface by an applied magnetic field. This gives rise to an intriguing novel form of paramagnetic limiting and would explain the puzzling observation of the suppression of the upper critical field of the inhomogeneous 3-Kelvin phase.