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Resonance peak in Sr(2)RuO(4): signature of spin triplet pairing
D K Morr1, P F Trautman, M J Graf
1Theoretical Division, MS B262, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Physical Review Letters
|June 21, 2001
Abstract:
We study the dynamical spin susceptibility, chi(q,omega), in the normal and superconducting states of Sr(2)RuO(4). In the normal state, we find a peak in the vicinity of Q(i) approximately (0.72 pi,0.72 pi) in agreement with recent inelastic neutron scattering experiments. We predict that for spin triplet pairing in the superconducting state a resonance peak appears in the out-of-plane component of chi, but is absent in the in-plane component. In contrast, no resonance peak is expected for spin singlet pairing.