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

Guo Qing Zheng; Kenji Tanabe; Shinj Kawasaki; Yoshio Kitaoka; Dai Aoki; Yoshinori Haga; Yoshichika Onuki

doi:10.1143/jpsjs.71s.279

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

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

Research output: Contribution to journal › Article › peer-review

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-T_c copper oxides and suggest the importance of the magnetic fluctuations for the occurrence of the unconventional superconductivity.

Original language	English
Pages (from-to)	279-281
Number of pages	3
Journal	journal of the physical society of japan
Volume	71
Issue number	SUPPL.
DOIs	https://doi.org/10.1143/jpsjs.71s.279
Publication status	Published - 2002
Externally published	Yes

Keywords

Celrlns
Heavy fermion
Magnetic fluctuations
NQR
Superconductivity

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/jpsjs.71s.279

Cite this

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title = "Anisotropic magnetic fluctuations and unconventional superconductivity in the layered heavy fermion compound celrln5",

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.",

keywords = "Celrlns, Heavy fermion, Magnetic fluctuations, NQR, Superconductivity",

author = "Zheng, {Guo Qing} and Kenji Tanabe and Shinj Kawasaki and Yoshio Kitaoka and Dai Aoki and Yoshinori Haga and Yoshichika Onuki",

year = "2002",

doi = "10.1143/jpsjs.71s.279",

language = "English",

volume = "71",

pages = "279--281",

journal = "journal of the physical society of japan",

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publisher = "Physical Society of Japan",

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TY - JOUR

T1 - Anisotropic magnetic fluctuations and unconventional superconductivity in the layered heavy fermion compound celrln5

AU - Zheng, Guo Qing

AU - Tanabe, Kenji

AU - Kawasaki, Shinj

AU - Kitaoka, Yoshio

AU - Aoki, Dai

AU - Haga, Yoshinori

AU - Onuki, Yoshichika

PY - 2002

Y1 - 2002

N2 - 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.

AB - 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.

KW - Celrlns

KW - Heavy fermion

KW - Magnetic fluctuations

KW - NQR

KW - Superconductivity

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