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The Unconventional Superconductivity of Sr2RuO4

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Zitation

Forgan, E. M., Mackenzie, A. P., & Maeno, Y. (1999). The Unconventional Superconductivity of Sr2RuO4. Journal of Low Temperature Physics, 117(5-6), 1567-1574. doi:10.1023/A:1022547212493.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0018-EF1D-C
Zusammenfassung
We review the evidence for unconventional superconductivity in Sr 2 RuO 4 ; the pairing in this material is certainly non-s-wave, and most of the current observations can be accounted for by a particular p-wave state, which is doubly degenerate and breaks time-reversal symmetry. Our observations of the flux lattice by small-angle neutron scattering contribute to this picture. The square flux lattice and the intensity of the diffracted signal indicate that superconductivity resides primarily on the γ sheet of the Fermi surface, which is derived from the Ru - d xy orbitals. This is in agreement with the “orbital-dependent” p-wave scenario. Furthermore, the shape of the flux lines derived from these measurements is strongly indicative of a two-component order parameter.