Abstract
We report the systematic evolution of the superconducting (SC) characteristics of the heavy-fermion (HF) superconductor 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) specific to a quantum critical point (QCP). It is demonstrated that the marked suppression of AFM SFs leads to a reduction in the SC energy gap or in the coupling strength of the Cooper pair. Tc, nevertheless, increases with increasing P 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) | 2073-2076 |
| Number of pages | 4 |
| Journal | journal of the physical society of japan |
| Volume | 73 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 1 2004 |
Keywords
- CeCoIn
- Heavy fermion
- NQR
- Pressure
- Superconductivity
ASJC Scopus subject areas
- Physics and Astronomy(all)
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Yashima, M., Kawasaki, S., Kawasaki, Y., Zheng, G. Q., Kitaoka, Y., Shishido, H., Settai, R., Haga, Y., & Onuki, Y. (2004). Magnetic criticality and unconventional superconductivity in CeCoIn 5: Study of 115in-nuclear quadrupole resonance under pressure. journal of the physical society of japan, 73(8), 2073-2076. https://doi.org/10.1143/JPSJ.73.2073