Cu-NQR study of CeCu2(Si0.98Ge0.02)2 under hydrostatic pressure

Y. Kawasaki, K. Ishida, K. Obinata, T. Mito, G. Q. Zheng, Y. Kitaoka, C. Geibel, F. Steglich

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

We report a pressure effect on CeCu2(Si0.98Ge0.02)2 where an antiferromagnetic order below TN∼0.75 K coexists with superconductivity below Tc∼0.4 K. At pressures exceeding 0.56 GPa, the magnetic order is suppressed and concomitantly the unconventional superconducting state evolves into a typical heavy-fermion one with a line-node gap. This result demonstrates that the magnetic order is due to the lattice expansion caused by doping Ge. We remark that the characteristic feature of exotic coexisting state at ambient pressure is the persistence of low-lying magnetic excitations even in the superconducting state.

Original languageEnglish
Pages (from-to)428-430
Number of pages3
JournalPhysica B: Condensed Matter
Volume312-313
DOIs
Publication statusPublished - Mar 1 2002
Externally publishedYes
EventInternational Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States
Duration: Aug 6 2002Aug 6 2002

Keywords

  • CeCuSi
  • NQR
  • Pressure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Kawasaki, Y., Ishida, K., Obinata, K., Mito, T., Zheng, G. Q., Kitaoka, Y., Geibel, C., & Steglich, F. (2002). Cu-NQR study of CeCu2(Si0.98Ge0.02)2 under hydrostatic pressure. Physica B: Condensed Matter, 312-313, 428-430. https://doi.org/10.1016/S0921-4526(01)01531-9