Abstract
We have carried out nuclear quadrupole resonance (NQR) measurements in the filled skutterudite compounds Pr(Os1-xRux) 4Sb12 (x = 0.1, 0.2), in order to gain insights into the symmetry of the superconducting gap function. Upon replacing Os with Ru, the spin-lattice relaxation rate 1/T1 becomes proportional to temperature (T) at low T far below Tc, and the magnitude of (1/T 1T)low-T increases with increasing Ru content. These results indicate that a finite density of states is induced at the Fermi level by the impurity, and thus suggest that there exist nodes in the gap function of PrOs4Sb12.
| Original language | English |
|---|---|
| Pages (from-to) | 1938-1941 |
| Number of pages | 4 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 74 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jul 2005 |
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Keywords
- Filled skutterudite
- Heavy fermion
- Impurity effect
- Nuclear quadrupole resonance
- Residual DOS
- Superconductivity
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Impurity effect as a probe for the gap function in the filled skutterudite compound superconductor PrOs4Sb12 : Sb-NQR study. / Nishiyama, Masahide; Kato, Takayuki; Sugawara, Hitoshi; Kikuchi, Daisuke; Sato, Hideyuki; Harima, Hisatomo; Zheng, Guo-Qing.
In: Journal of the Physical Society of Japan, Vol. 74, No. 7, 07.2005, p. 1938-1941.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Impurity effect as a probe for the gap function in the filled skutterudite compound superconductor PrOs4Sb12
T2 - Sb-NQR study
AU - Nishiyama, Masahide
AU - Kato, Takayuki
AU - Sugawara, Hitoshi
AU - Kikuchi, Daisuke
AU - Sato, Hideyuki
AU - Harima, Hisatomo
AU - Zheng, Guo-Qing
PY - 2005/7
Y1 - 2005/7
N2 - We have carried out nuclear quadrupole resonance (NQR) measurements in the filled skutterudite compounds Pr(Os1-xRux) 4Sb12 (x = 0.1, 0.2), in order to gain insights into the symmetry of the superconducting gap function. Upon replacing Os with Ru, the spin-lattice relaxation rate 1/T1 becomes proportional to temperature (T) at low T far below Tc, and the magnitude of (1/T 1T)low-T increases with increasing Ru content. These results indicate that a finite density of states is induced at the Fermi level by the impurity, and thus suggest that there exist nodes in the gap function of PrOs4Sb12.
AB - We have carried out nuclear quadrupole resonance (NQR) measurements in the filled skutterudite compounds Pr(Os1-xRux) 4Sb12 (x = 0.1, 0.2), in order to gain insights into the symmetry of the superconducting gap function. Upon replacing Os with Ru, the spin-lattice relaxation rate 1/T1 becomes proportional to temperature (T) at low T far below Tc, and the magnitude of (1/T 1T)low-T increases with increasing Ru content. These results indicate that a finite density of states is induced at the Fermi level by the impurity, and thus suggest that there exist nodes in the gap function of PrOs4Sb12.
KW - Filled skutterudite
KW - Heavy fermion
KW - Impurity effect
KW - Nuclear quadrupole resonance
KW - Residual DOS
KW - Superconductivity
UR - http://www.scopus.com/inward/record.url?scp=24744463312&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=24744463312&partnerID=8YFLogxK
U2 - 10.1143/JPSJ.74.1938
DO - 10.1143/JPSJ.74.1938
M3 - Article
AN - SCOPUS:24744463312
VL - 74
SP - 1938
EP - 1941
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 7
ER -