NQR study of pressure induced superconductivity in CeCu2Si2

K. Fujiwara, Y. Okazaki, Y. Hata, K. Miyoshi, J. Takeuchi, T. C. Kobayashi, C. Geibel, F. Steglich

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We have measured nuclear quadrupole resonance (NQR) for *Cu nuclei under high pressure up to 4.8 GPa.A linear increase in NQR frequency *νQ of *Cu nuclei was observed below 3 GPa. However, *νQ deviates gradually from the linear relation above 3.5 GPa. The downward deviation is associated with a change of valence and consistent with the results of band calculations with the structural parameters under pressure. Antiferromagnetic (AFM) spin fluctuations are drastically suppressed with increasing pressure, whereas Tc increases from 0.7K at ambient pressure to 1.64K at 4.2 GPa. We have found that bulk superconductivity suddenly disappears at 4.8 GPa accompanied with a rapid decrease in the density of states at the Fermi level.

Original languageEnglish
Pages (from-to)608-610
Number of pages3
JournalPhysica Status Solidi (B) Basic Research
Volume247
Issue number3
DOIs
Publication statusPublished - Mar 2010

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'NQR study of pressure induced superconductivity in CeCu<sub>2</sub>Si<sub>2</sub>'. Together they form a unique fingerprint.

Cite this