Zero-Field muSR Search for a Time-Reversal-Symmetry-Breaking Mixed Pairing State in Superconducting Ba1-xKxFe2As2

A. Cannell; A. Zelati; C. Gomez; D.G. Mandrus; E.V.L. de Mello; J.E. Sonier; J.-Q. Yan; S. Tezok; Z. Lotfi Mahyari

arxiv: 1311.5235 · v2 · pith:YNTEPKLVnew · submitted 2013-11-20 · ❄️ cond-mat.supr-con

Zero-Field muSR 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

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J.E. Sonier

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classification ❄️ cond-mat.supr-con

keywords ba1-xkxfe2as2fieldsinternalmagneticmixedpairingsamplessearch

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We report the results of a zero-field muon spin relaxation (ZF-muSR) 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.

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Zero-Field muSR Search for a Time-Reversal-Symmetry-Breaking Mixed Pairing State in Superconducting Ba1-xKxFe2As2

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