TY - JOUR
T1 - Enhancing the superconducting transition temperature of CeRh1-xIrxIn5 due to the strong-coupling effects of antiferromagnetic spin fluctuations
T2 - An In115 nuclear quadrupole resonance study
AU - Kawasaki, Shinji
AU - Yashima, Mitsuharu
AU - Mugino, Yoichi
AU - Mukuda, Hidekazu
AU - Kitaoka, Yoshio
AU - Shishido, Hiroaki
AU - Onuki, Yoshichika
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2006
Y1 - 2006
N2 - We report on systematic evolutions of antiferromagnetic (AFM) spin fluctuations and unconventional superconductivity (SC) in heavy-fermion (HF) compounds CeRh1-xIrxIn5 via an In115 nuclear-quadrupole-resonance experiment. The nuclear spin-lattice relaxation rate 1/T1 has revealed the marked development of AFM spin fluctuations as approaching an AFM ordered state. Concomitantly, the superconducting transition temperature Tc and the energy gap Δ0 increase drastically from Tc=0.4K and 2Δ0/kBTc=5 in CeIrIn5 up to Tc=1.2K and 2Δ0/kBTc=8.3 in CeRh0.3Ir0.7In5, respectively. The present work suggests that the AFM spin fluctuations in close proximity to the AFM quantum critical point are indeed responsible for the strong-coupling unconventional SC in HF compounds.
AB - We report on systematic evolutions of antiferromagnetic (AFM) spin fluctuations and unconventional superconductivity (SC) in heavy-fermion (HF) compounds CeRh1-xIrxIn5 via an In115 nuclear-quadrupole-resonance experiment. The nuclear spin-lattice relaxation rate 1/T1 has revealed the marked development of AFM spin fluctuations as approaching an AFM ordered state. Concomitantly, the superconducting transition temperature Tc and the energy gap Δ0 increase drastically from Tc=0.4K and 2Δ0/kBTc=5 in CeIrIn5 up to Tc=1.2K and 2Δ0/kBTc=8.3 in CeRh0.3Ir0.7In5, respectively. The present work suggests that the AFM spin fluctuations in close proximity to the AFM quantum critical point are indeed responsible for the strong-coupling unconventional SC in HF compounds.
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U2 - 10.1103/PhysRevLett.96.147001
DO - 10.1103/PhysRevLett.96.147001
M3 - Article
AN - SCOPUS:33645802407
SN - 0031-9007
VL - 96
JO - Physical Review Letters
JF - Physical Review Letters
IS - 14
M1 - 147001
ER -