NQR study of pressure induced superconductivity in CeCu2Si2

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

Research output: Contribution to journalArticle

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

Fingerprint

Nuclear quadrupole resonance
nuclear quadrupole resonance
Superconductivity
superconductivity
nuclei
Spin fluctuations
Fermi level
valence
deviation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Fujiwara, K., Okazaki, Y., Hata, Y., Miyoshi, K., Takeuchi, J., Kobayashi, T., ... Steglich, F. (2010). NQR study of pressure induced superconductivity in CeCu2Si2. Physica Status Solidi (B) Basic Research, 247(3), 608-610. https://doi.org/10.1002/pssb.200983050

NQR study of pressure induced superconductivity in CeCu2Si2. / Fujiwara, K.; Okazaki, Y.; Hata, Y.; Miyoshi, K.; Takeuchi, J.; Kobayashi, Tatsuo; Geibel, C.; Steglich, F.

In: Physica Status Solidi (B) Basic Research, Vol. 247, No. 3, 03.2010, p. 608-610.

Research output: Contribution to journalArticle

Fujiwara, K, Okazaki, Y, Hata, Y, Miyoshi, K, Takeuchi, J, Kobayashi, T, Geibel, C & Steglich, F 2010, 'NQR study of pressure induced superconductivity in CeCu2Si2', Physica Status Solidi (B) Basic Research, vol. 247, no. 3, pp. 608-610. https://doi.org/10.1002/pssb.200983050
Fujiwara, K. ; Okazaki, Y. ; Hata, Y. ; Miyoshi, K. ; Takeuchi, J. ; Kobayashi, Tatsuo ; Geibel, C. ; Steglich, F. / NQR study of pressure induced superconductivity in CeCu2Si2. In: Physica Status Solidi (B) Basic Research. 2010 ; Vol. 247, No. 3. pp. 608-610.
@article{28b32d3e20574c75bb79c5a53fc4f6d1,
title = "NQR study of pressure induced superconductivity in CeCu2Si2",
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.",
author = "K. Fujiwara and Y. Okazaki and Y. Hata and K. Miyoshi and J. Takeuchi and Tatsuo Kobayashi and C. Geibel and F. Steglich",
year = "2010",
month = "3",
doi = "10.1002/pssb.200983050",
language = "English",
volume = "247",
pages = "608--610",
journal = "Physica Status Solidi (B): Basic Research",
issn = "0370-1972",
publisher = "Wiley-VCH Verlag",
number = "3",

}

TY - JOUR

T1 - NQR study of pressure induced superconductivity in CeCu2Si2

AU - Fujiwara, K.

AU - Okazaki, Y.

AU - Hata, Y.

AU - Miyoshi, K.

AU - Takeuchi, J.

AU - Kobayashi, Tatsuo

AU - Geibel, C.

AU - Steglich, F.

PY - 2010/3

Y1 - 2010/3

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=77952001749&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77952001749&partnerID=8YFLogxK

U2 - 10.1002/pssb.200983050

DO - 10.1002/pssb.200983050

M3 - Article

AN - SCOPUS:77952001749

VL - 247

SP - 608

EP - 610

JO - Physica Status Solidi (B): Basic Research

JF - Physica Status Solidi (B): Basic Research

SN - 0370-1972

IS - 3

ER -