Zero-field μSR search for a time-reversal-symmetry-breaking mixed pairing state in superconducting Ba1−xKxFe2As2
Z. Lotfi Mahyari, A. Cannell, C. Gomez, S. Tezok, A. Zelati, E. V. L. de Mello, J.-Q. Yan, D. G. Mandrus, J. E. Sonier
DOI 10.1103/PhysRevB.89.020502 · Physical Review B
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Abstract
We report the results of a zero-field muon-spin relaxation (ZF-μSR) study of superconducting Ba1−xKxFe2As2 (0.5≤x≤0.9) in search of weak spontaneous internal magnetic fields associated with proposed time-reversal-symmetry-breaking mixed pairing states. The measurements were performed on polycrystalline samples, which do not exhibit the mesoscopic phase separation previously observed in single crystals of Ba1−xKxFe2As2. No evidence of spontaneous internal magnetic fields is found in any of the samples at temperatures down to T∼0.02 K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba0.5K0.5Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 47 | Pressure not reported | unknown |
| Ba0.4K0.6Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
| Ba0.3K0.7Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20 | Pressure not reported | unknown |
| Ba0.2K0.8Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11 | Pressure not reported | unknown |
| Ba0.1K0.9Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | Pressure not reported | unknown |
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