Anomalous electrodynamic response in the mixed-valence superconductor CeRu2

Authors
Sluchanko, NE Glushkov, VV Demishev, SV Samarin, NA Voskoboinikov, IB Chystiakov, OD Bruynseraede, Y Moshchalkov, VV
Citation
Ne. Sluchanko et al., Anomalous electrodynamic response in the mixed-valence superconductor CeRu2, JETP LETTER, 69(10), 1999, pp. 798-803
Citations number
27
Categorie Soggetti
Physics
Journal title
JETP LETTERS
ISSN journal
00213640 → ACNP
Volume
69
Issue
10
Year of publication
1999
Pages
798 - 803
Database
ISI
SICI code
0021-3640(19990525)69:10<798:AERITM>2.0.ZU;2-X
Abstract
We report the first results of microwave magnetoabsorption measurements (35 -140 GHz) in the intermediate-valence superconductor CeRu2. The anomalous e lectrodynamic 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 CeRu 2 mixed state of a first-order phase transition that may be explained in te rms of Fulde-Ferrel-Larkin-Ovchinnikov state formation. (C) 1999 American I nstitute of Physics. [S0021-3640(99)01410-3].