Possibility of chiral d-wave state in the hexagonal pnictide superconductor SrPtAs
Hikaru Ueki, Ryota Tamura, Jun Goryo
DOI 10.1103/PhysRevB.99.144510 · Physical Review B
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Abstract
We discuss the type of pairing in the hexagonal pnictide superconductor SrPtAs, taking into account its multiband structure. The topological chiral d-wave state with time-reversal symmetry breaking has been anticipated from the spontaneous magnetization observed by the muon-spin-relaxation experiment. We point out in this paper that the recent experimental reports on the nuclear-spin-lattice relaxation rate T1−1 and superfluid density ns(T), which seemingly support the conventional s-wave pairing, are also consistent with the chiral d-wave state. The compatibility of the gap and multiband structures is crucial in this argument. We propose that the measurement of the bulk quasiparticle density of states would be useful for the distinction between two pairing states.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SrPtAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.4 | Pressure not reported | unknown |
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