Orbital-singlet pairing and order parameter symmetry in Sr₂RuO₄
Werner, Ralph
Original · EN
Based on the degeneracy of the dzx and dyz orbitals in Sr₂RuO₄ it is argued that the Cooper pairs condense in orbital singlets. Together with the spin-triplet wave functions the real-space wave function then is symmetric. Considering interaction effects the order parameter is found to have A₁g symmetry consistent with a number of experimental observations. The sensitivity of the material on non-magnetic impurities follows in a straightforward manner from the orbital-singlet configuration.
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