Quasiparticle spectrum of the hybrid s+g-wave superconductors YNi2B2C and LuNi2B2C
Kazumi Maki, Hyekyung Won, Stephan Haas
DOI 10.1103/PhysRevB.69.012502 · Physical Review B
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Abstract
Recent experiments on single crystals of YNi2B2C have revealed the presence of point nodes in the superconducting energy gap Δ(k) at k̂=(1,0,0),(0,1,0),(−1,0,0), and (0,−1,0). In this paper we investigate the effects of impurity scattering on the quasiparticle spectrum in the vortex state of s+g-wave superconductors, which is found to be strongly modified in the presence of disorder. In particular, a gap in the quasiparticle energy spectrum is found to open even for infinitesimal impurity scattering, giving rise to exponentially activated thermodynamic response functions, such as the specific heat, the spin susceptibility, the superfluid density, and the nuclear spin lattice relaxation. Predictions derived from this study can be verified by measurements of the angular dependent magnetospecific heat and the magnetothermal conductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 15.5 | Pressure not reported | unknown |
| Y(Ni1-xPtx)2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13.1 | Pressure not reported | unknown |
| LuNi2B2C 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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