Evidence for triplet superconductivity near an antiferromagnetic instability in CrAs
C. Y. Guo, M. Smidman, B. Shen, W. Wu, F. K. Lin, X. L. Han, Y. Chen, F. Wu, Y. F. Wang, W. B. Jiang, X. Lu, J. P. Hu, J. L. Luo, H. Q. Yuan
DOI 10.1103/PhysRevB.98.024520 · Physical Review B
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Abstract
Superconductivity was recently observed in CrAs as the helimagnetic order is suppressed by applying pressure, suggesting possible unconventional superconductivity. To reveal the nature of the superconducting order parameter of CrAs, here we report the angular dependence of the upper critical field under pressure. Upon rotating the field by 360∘ in the bc plane, six maxima are observed in the upper critical field, where the oscillations have both sixfold- and twofold-symmetric components. Our analysis suggests the presence of an unconventional odd-parity spin-triplet state.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CrAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.85 | 1.3 GPa | midpoint |
| MnP Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | 8 GPa | unknown |
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