Spin-resonance peak in NaxCoO2∙yH2O superconductors: A probe of the pairing symmetry
Jian-Xin Li, Z. D. Wang
DOI 10.1103/PhysRevB.70.212512 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Spin dynamics in the superconducting state of the newly discovered NaxCoO2∙yH2O superconductor with three possible pairing symmetries (px+ipy, d+id′, and f wave) is studied theoretically on a two-dimensional triangular lattice. We find that a spin resonance peak, which is found to have a close relevance to the relative phase of the gap function and the geometry of the Fermi surface, appears in both the in-plane and the out-of-plane components of the spin susceptibility for the spin-singlet (d+id′)-wave pairing, while only in the out-of-plane (in-plane) component for the spin-triplet (px+ipy)-wave (f-wave) pairing. We also indicate that there is no spin resonance for an s-wave pairing. These distinct features may be used to probe or determine the pairing symmetry in this compound unambiguously.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NaxCoO2.yH2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | unknown |
Similar papers
s-wave superconductivity due to Suhl-Kondo mechanism in NaxCoO2⋅yH2O: Effect of Coulomb interaction and trigonal distortion
similarity 0.94Keiji Yada & Hiroshi Kontani
Source status unknown — claims are unverified
Cooperative effect of phonons and electronic correlations for superconductivity in cobaltates
similarity 0.94A. Foussats et al.
Source status unknown — claims are unverified
Spin resonance peak in NaCoOHO superconductors: A probe of the pairing symmetry
similarity 0.94Jian-Xin Li & Z. D. Wang · 2003 · arXiv:cond-mat/0310308
Source status unknown — claims are unverified
Possible unconventional superconductivity in NaxCoO2·yH2O probed by muon spin rotation and relaxation
similarity 0.93Wataru Higemoto et al.
Source status unknown — claims are unverified
Nuclear spin-lattice relaxation rate in the D1+iD2 superconducting state: Implications for CoO superconductor
similarity 0.93Yunkyu Bang et al.
Source status unknown — claims are unverified
Observation of Bulk Superconductivity in NaxCoO2·yH2O and NaxCoO2·yD2O Powder and Single Crystals
similarity 0.92R. Jin et al.
Source status unknown — claims are unverified