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          Institute: MPI für Chemische Physik fester Stoffe     Collection: publications 2002     Display Documents

ID: 17701.0, MPI für Chemische Physik fester Stoffe / publications 2002
Coexistence of antiferromagnetism and superconductivity in heavy-fermion systems
Authors:Kitaoka, Y.; Kawasaki, Y.; Mito, T.; Kawasaki, S.; Zheng, G. Q.; Ishida, K.; Aoki, D.; Haga, Y.; Settai, R.; Onuki, Y.; Geibel, C.; Steglich, F.
Date of Publication (YYYY-MM-DD):2002-06
Title of Journal:Journal of Physics and Chemistry of Solids
Journal Abbrev.:J. Phys. Chem. Solids
Issue / Number:6-8
Start Page:1141
End Page:1146
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:We report the novel pressure (P)-temperature (T) phase diagrams of antiferromagnetism (AFM) and superconductivity (SC) in CeRhIn5, CeIn3, and CeCu2Si2 revealed by the nuclear quadrupole resonance measurement. In the itinerant helical magnet CeRhIn5, we found that the Neel temperature T-N is reduced at P greater than or equal to 1.23 GPa with an emergent pseudogap behavior. The coexistence of AFM and SC is found in a narrow P range of 1.63-1.75 GPa, followed by the onset of SC with line-node gap over a wide P window 2.1-5 GPa. In CeIn3, the localized magnetic character is robust against the application of pressure up to P similar to 1.9 GPa, beyond which the system evolves into an itinerant regime in which the resistive superconducting phase emerges. We discuss the relationship between the phase diagram and the magnetic fluctuations. In CeCu2Si2, the SC and AFM coexist on a microscopic level once its lattice parameter is expanded. We remark that the underlying marginal AFM state is due to collective magnetic excitations in the superconducting state in CeCu2Si2. An interplay between AFM and SC is discussed on the SO(5) scenario that unifies AFM and SC. We suggest that the SC and AFM in CeCu2Si2 have a common mechanism. (C) 2002 Elsevier Science Ltd. All rights reserved.
Free Keywords:superconductors; crystal structure; superconductivity; magnetic properties; nuclear quadrupole resonance (NQR)
Comment of the Author/Creator:Date: 2002, JUN-AUG
External Publication Status:published
Document Type:Article
Communicated by:Ina Wanschura
Affiliations:MPI für chemische Physik fester Stoffe
External Affiliations:Osaka Univ, Grad Sch Engn Sci, Dept Phys Sci, Toyonaka, Osaka; 5608531, Japan; Osaka Univ, Grad Sch Engn Sci, Dept Phys Sci, Toyonaka, Osaka 5608531, Japan; Osaka Univ, Grad Sch Sci, Dept Phys, Toyonaka, Osaka 5600043, Japan; Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany
Identifiers:ISI:000176762300056 [ID No:1]
ISSN:0022-3697 [ID No:2]
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