Unconventional superconductivity and antiferromagnetic quantum criticality in CeRh1 - x Irx In5

S. Kawasaki; M. Yashima; Y. Mugino; H. Mukuda; Y. Kitaoka; H. Shishido; Y. Onuki

doi:10.1016/j.physb.2006.01.152

Unconventional superconductivity and antiferromagnetic quantum criticality in CeRh_{1 - x} Ir_x In₅

S. Kawasaki, M. Yashima, Y. Mugino, H. Mukuda, Y. Kitaoka, H. Shishido, Y. Onuki

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

Abstract

We report on chemical-substitution-induced evolution of magnetic correlations and unconventional superconductivity (SC) in CeRh_{1 - x} Ir_x In₅ via the ¹¹⁵In nuclear-quadrupole-resonance (NQR) measurements. It is revealed that the chemical substitution of Rh for Ir enhances markedly antiferromagnetic (AFM) spin fluctuations and superconducting transition temperature T_c. The temperature dependence of nuclear spin-lattice relaxation rate 1 / T₁ for x = 0.7 revealing a highest T_c = 1.2 K is interpreted by the anisotropic AFM spin fluctuations model that predicts a relation of T₁ T ∝ ( T + θ )^{3 / 4} with θ ∼ 0. This indicates that the AFM quantum critical spin fluctuations are dominant in the normal state and then enhances T_c through the strong coupling effect of pairing interaction for x = 0.7.

Original language	English
Pages (from-to)	400-401
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.152
Publication status	Published - May 1 2006
Externally published	Yes

Keywords

CeRh Ir In
NQR
Pressure
Spin fluctuations
Superconductivity

ASJC Scopus subject areas

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

Access to Document

10.1016/j.physb.2006.01.152

Cite this

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title = "Unconventional superconductivity and antiferromagnetic quantum criticality in CeRh1 - x Irx In5",

abstract = "We report on chemical-substitution-induced evolution of magnetic correlations and unconventional superconductivity (SC) in CeRh1 - x Irx In5 via the 115In nuclear-quadrupole-resonance (NQR) measurements. It is revealed that the chemical substitution of Rh for Ir enhances markedly antiferromagnetic (AFM) spin fluctuations and superconducting transition temperature Tc. The temperature dependence of nuclear spin-lattice relaxation rate 1 / T1 for x = 0.7 revealing a highest Tc = 1.2 K is interpreted by the anisotropic AFM spin fluctuations model that predicts a relation of T1 T ∝ ( T + θ )3 / 4 with θ ∼ 0. This indicates that the AFM quantum critical spin fluctuations are dominant in the normal state and then enhances Tc through the strong coupling effect of pairing interaction for x = 0.7.",

keywords = "CeRh Ir In, NQR, Pressure, Spin fluctuations, Superconductivity",

author = "S. Kawasaki and M. Yashima and Y. Mugino and H. Mukuda and Y. Kitaoka and H. Shishido and Y. Onuki",

note = "Funding Information: This work was supported by Grant-in-Aid for Creative Scientific Research (15GS0213) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) and The 21st Century COE Program (G18) by Japan Society of the Promotion of Science (JSPS). ",

year = "2006",

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doi = "10.1016/j.physb.2006.01.152",

language = "English",

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journal = "Physica B: Condensed Matter",

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T1 - Unconventional superconductivity and antiferromagnetic quantum criticality in CeRh1 - x Irx In5

AU - Kawasaki, S.

AU - Yashima, M.

AU - Mugino, Y.

AU - Mukuda, H.

AU - Kitaoka, Y.

AU - Shishido, H.

AU - Onuki, Y.

N1 - Funding Information: This work was supported by Grant-in-Aid for Creative Scientific Research (15GS0213) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) and The 21st Century COE Program (G18) by Japan Society of the Promotion of Science (JSPS).

PY - 2006/5/1

Y1 - 2006/5/1

N2 - We report on chemical-substitution-induced evolution of magnetic correlations and unconventional superconductivity (SC) in CeRh1 - x Irx In5 via the 115In nuclear-quadrupole-resonance (NQR) measurements. It is revealed that the chemical substitution of Rh for Ir enhances markedly antiferromagnetic (AFM) spin fluctuations and superconducting transition temperature Tc. The temperature dependence of nuclear spin-lattice relaxation rate 1 / T1 for x = 0.7 revealing a highest Tc = 1.2 K is interpreted by the anisotropic AFM spin fluctuations model that predicts a relation of T1 T ∝ ( T + θ )3 / 4 with θ ∼ 0. This indicates that the AFM quantum critical spin fluctuations are dominant in the normal state and then enhances Tc through the strong coupling effect of pairing interaction for x = 0.7.

AB - We report on chemical-substitution-induced evolution of magnetic correlations and unconventional superconductivity (SC) in CeRh1 - x Irx In5 via the 115In nuclear-quadrupole-resonance (NQR) measurements. It is revealed that the chemical substitution of Rh for Ir enhances markedly antiferromagnetic (AFM) spin fluctuations and superconducting transition temperature Tc. The temperature dependence of nuclear spin-lattice relaxation rate 1 / T1 for x = 0.7 revealing a highest Tc = 1.2 K is interpreted by the anisotropic AFM spin fluctuations model that predicts a relation of T1 T ∝ ( T + θ )3 / 4 with θ ∼ 0. This indicates that the AFM quantum critical spin fluctuations are dominant in the normal state and then enhances Tc through the strong coupling effect of pairing interaction for x = 0.7.

KW - CeRh Ir In

KW - NQR

KW - Pressure

KW - Spin fluctuations

KW - Superconductivity

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