Unconventional superconductivity near the antiferromagnetic criticality in CeCoIn5: A study of 115In-NQR under pressure

M. Yashima; S. Kawasaki; Y. Kawasaki; G. Q. Zheng; Y. Kitaoka; H. Shishido; R. Settai; Y. Haga; Y. Onuki

doi:10.1016/j.physb.2005.01.080

Unconventional superconductivity near the antiferromagnetic criticality in CeCoIn₅: A study of ¹¹⁵In-NQR under pressure

M. Yashima, S. Kawasaki, Y. Kawasaki, G. Q. Zheng, Y. Kitaoka, H. Shishido, R. Settai, Y. Haga, Y. Onuki

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

2 Citations (Scopus)

Abstract

We report on a systematic evolution of the superconducting (SC) characteristics of CeCoIn5 via nuclear-quadrupole-resonance (NQR) measurement under pressure (P). The application of P significantly suppresses the nuclear spin-lattice relaxation rate 1/T1 that is dominated by antiferromagnetic (AFM) spin fluctuations (SFs). The marked suppression of AFM SFs leads to the reduction in the size of SC energy gap. Nevertheless, Tc increases with the pressure due to the increase in HF bandwidth. This is expected to make the lifetime of quasi-particles sufficiently long.

Original language	English
Pages (from-to)	404-406
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	359-361
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2005.01.080
Publication status	Published - Apr 30 2005
Externally published	Yes

Keywords

NQR
Pressure effect
Superconductivity

ASJC Scopus subject areas

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

Access to Document

10.1016/j.physb.2005.01.080

Cite this

@article{77fbbcf373424f3994c92b15fc416b78,

title = "Unconventional superconductivity near the antiferromagnetic criticality in CeCoIn5: A study of 115In-NQR under pressure",

abstract = "We report on a systematic evolution of the superconducting (SC) characteristics of CeCoIn5 via nuclear-quadrupole-resonance (NQR) measurement under pressure (P). The application of P significantly suppresses the nuclear spin-lattice relaxation rate 1/T1 that is dominated by antiferromagnetic (AFM) spin fluctuations (SFs). The marked suppression of AFM SFs leads to the reduction in the size of SC energy gap. Nevertheless, Tc increases with the pressure due to the increase in HF bandwidth. This is expected to make the lifetime of quasi-particles sufficiently long.",

keywords = "NQR, Pressure effect, Superconductivity",

author = "M. Yashima and S. Kawasaki and Y. Kawasaki and Zheng, {G. Q.} and Y. Kitaoka and H. Shishido and R. Settai and Y. Haga and Y. Onuki",

note = "Funding Information: This work was supported by the Grant-in-Aid for Creative Scientific Research (15GS0123), MEXT and The 21st Century COE Program supported by the Japan Society for the Promotion of Science. One of the authors (S.K.) has been supported by JSPS.",

year = "2005",

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doi = "10.1016/j.physb.2005.01.080",

language = "English",

volume = "359-361",

pages = "404--406",

journal = "Physica B: Condensed Matter",

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T1 - Unconventional superconductivity near the antiferromagnetic criticality in CeCoIn5

T2 - A study of 115In-NQR under pressure

AU - Yashima, M.

AU - Kawasaki, S.

AU - Kawasaki, Y.

AU - Zheng, G. Q.

AU - Kitaoka, Y.

AU - Shishido, H.

AU - Settai, R.

AU - Haga, Y.

AU - Onuki, Y.

N1 - Funding Information: This work was supported by the Grant-in-Aid for Creative Scientific Research (15GS0123), MEXT and The 21st Century COE Program supported by the Japan Society for the Promotion of Science. One of the authors (S.K.) has been supported by JSPS.

PY - 2005/4/30

Y1 - 2005/4/30

N2 - We report on a systematic evolution of the superconducting (SC) characteristics of CeCoIn5 via nuclear-quadrupole-resonance (NQR) measurement under pressure (P). The application of P significantly suppresses the nuclear spin-lattice relaxation rate 1/T1 that is dominated by antiferromagnetic (AFM) spin fluctuations (SFs). The marked suppression of AFM SFs leads to the reduction in the size of SC energy gap. Nevertheless, Tc increases with the pressure due to the increase in HF bandwidth. This is expected to make the lifetime of quasi-particles sufficiently long.

AB - We report on a systematic evolution of the superconducting (SC) characteristics of CeCoIn5 via nuclear-quadrupole-resonance (NQR) measurement under pressure (P). The application of P significantly suppresses the nuclear spin-lattice relaxation rate 1/T1 that is dominated by antiferromagnetic (AFM) spin fluctuations (SFs). The marked suppression of AFM SFs leads to the reduction in the size of SC energy gap. Nevertheless, Tc increases with the pressure due to the increase in HF bandwidth. This is expected to make the lifetime of quasi-particles sufficiently long.

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KW - Pressure effect

KW - Superconductivity

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