Abstract
We report the first results of microwave magnetoabsorption measurements (35–140 GHz) in the intermediate-valence superconductor CeRu2. The anomalous electrodynamic response is found to derive from a transition from a weak to a strong pinning regime in the superconducting mixed state of this unusual metal. The experimental results strongly support the appearance in the CeRu2 mixed state of a first-order phase transition that may be explained in terms of Fulde-Ferrel-Larkin-Ovchinnikov state formation.
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Pis’ma Zh. Éksp. Teor. Fiz. 69, No. 10, 745–749 (25 May 1999)
Published in English in the original Russian journal. Edited by Steve Torstveit.
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Sluchanko, N.E., Glushkov, V.V., Demishev, S.V. et al. Anomalous electrodynamic response in the mixed-valence superconductor CeRu2 . Jetp Lett. 69, 798–803 (1999). https://doi.org/10.1134/1.568093
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DOI: https://doi.org/10.1134/1.568093