Coherence peak in the spin susceptibility from nesting in spin-triplet superconductors: A probe for line nodes in Sr2RuO4
Mayumi Yakiyama, Yasumasa Hasegawa
DOI 10.1103/PhysRevB.67.014512 · Physical Review B
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Abstract
We study the dynamical spin susceptibility χ(q,ω) for spin-triplet superconductivity. We show that a large peak at ω=2Δ appears in Imχzz(Q,ω), where z is the direction of the d vector for triplet pairing, if Fermi surface has a nested part with the nesting vector Q and the order parameters are +Δ and −Δ in this part of the Fermi surface. If there are line nodes in the nested part of the Fermi surface, a peak appears in either Imχzz(Q,ω) or Imχ+−(Q,ω), or both, depending on the perpendicular component of the nesting vector. The comparison with inelastic neutron-scattering experiments can determine the position of the line nodes in triplet superconductor Sr2RuO4.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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