Isotropic s-wave superconductivity in the noncentrosymmetric charge density wave superconductor SrPt2As2
R. Gupta, C. Löhnert, C. Wang, D. Johrendt, H. Luetkens, S. Malick, T. Shiroka, Z. Hossain, R. Khasanov
DOI 10.1103/PhysRevB.102.144515 · 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
SrPt2As2 undergoes a structural transition around 470 K (from a high-temperature tetragonal to a low-temperature orthorhombic phase) accompanied by a charge density wave transition and followed by a superconducting transition at much lower temperature (5 K). The superconducting gap symmetry of this noncentrosymmetric compound was investigated in detail by means of muon-spin rotation or relaxation (μSR) experiments in transverse-field (TF) configuration. The temperature-dependent magnetic penetration depth obtained from the TF−μSR spectra suggests an isotropic s-wave-type superconducting gap. No observable differences are seen in the asymmetry time spectra collected in zero field above and below the superconducting transition temperature Tc. This strongly suggests the absence of spontaneous magnetic fields in the superconducting state, hence pointing to a preserved time-reversal symmetry below Tc.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SrPt2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | onset |
| SrPt2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | unknown |
| BaFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Transport properties of three-dimensional extended s-wave states in Fe-based superconductors
similarity 0.96V. Mishra et al.
Source status unknown — claims are unverified
Induction of charge density waves by spin density waves in iron-based superconductors
similarity 0.95A. V. Balatsky et al.
Source status unknown — claims are unverified
Collective mode spectroscopy in time-reversal symmetry breaking superconductors
similarity 0.95Silvia Neri et al.
Source status unknown — claims are unverified
Evidence for superconductivity with broken time-reversal symmetry in locally noncentrosymmetric SrPtAs
similarity 0.95P. K. Biswas et al.
Source status unknown — claims are unverified
Multigap superconductivity in locally noncentrosymmetric SrPtAs: An As75 nuclear quadrupole resonance investigation
similarity 0.94F. Brückner et al.
Source status unknown — claims are unverified
Superconductivity and multiple pressure-induced phases in BaPt2As2
similarity 0.94C. Y. Guo et al.
Source status unknown — claims are unverified