Anisotropic magnetic fluctuations and unconventional superconductivity in the layered heavy fermion compound celrln5

Guo-Qing Zheng, Kenji Tanabe, Shinji Kawasaki, Yoshio Kitaoka, Dai Aoki, Yoshinori Haga, Yoshichika Onuki

Research output: Contribution to journalArticle

Abstract

We report the 115In nuclear spin-lattice relaxation rate (1/T1) measurements down to 90 mK in the new heavy fermion (HF) compound Celrln 5. At 0.4 K ≤ T ≤ 100 K, 1/T1 is strongly T-dependent, which indicates that the 4f electrons are much more itinerant than in known Ce- based HFs. From the unique temperature variation of 1/T1T, we find that this compound is located near a quantum critical point, with anisotropic spin fluctuations due to a layered crystal structure. Below the bulk superconductivity temperature 0.40 K, 1/T1 follows a T3 variation without a coherence peak, which indicates unconventional superconductivity with line-node gap. These aspects are reminiscent of the high-Tc copper oxides and suggest the importance of the magnetic fluctuations for the occurrence of the unconventional superconductivity.

Original languageEnglish
Pages (from-to)279-281
Number of pages3
JournalJournal of the Physical Society of Japan
Volume71
Issue numberSUPPL.
Publication statusPublished - 2002
Externally publishedYes

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superconductivity
fermions
copper oxides
spin-lattice relaxation
nuclear spin
critical point
occurrences
crystal structure
temperature
electrons

Keywords

  • Celrlns
  • Heavy fermion
  • Magnetic fluctuations
  • NQR
  • Superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Anisotropic magnetic fluctuations and unconventional superconductivity in the layered heavy fermion compound celrln5. / Zheng, Guo-Qing; Tanabe, Kenji; Kawasaki, Shinji; Kitaoka, Yoshio; Aoki, Dai; Haga, Yoshinori; Onuki, Yoshichika.

In: Journal of the Physical Society of Japan, Vol. 71, No. SUPPL., 2002, p. 279-281.

Research output: Contribution to journalArticle

Zheng, Guo-Qing ; Tanabe, Kenji ; Kawasaki, Shinji ; Kitaoka, Yoshio ; Aoki, Dai ; Haga, Yoshinori ; Onuki, Yoshichika. / Anisotropic magnetic fluctuations and unconventional superconductivity in the layered heavy fermion compound celrln5. In: Journal of the Physical Society of Japan. 2002 ; Vol. 71, No. SUPPL. pp. 279-281.
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AU - Aoki, Dai

AU - Haga, Yoshinori

AU - Onuki, Yoshichika

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