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Theory of the Knight Shift and Spin-Lattice Relaxation Rate in Pu-115

Published online by Cambridge University Press:  26 February 2011

Yunkyu Bang ,
Matthias J. Graf ,
Nicholas J. Curro  and
Alexander J. Balatsky
Yunkyu Bang
Affiliation:
ykbang@chonnam.ac.kr, Chonnam National University, Department of Physics, Korea, Democratic People's Republic of
Matthias J. Graf
Affiliation:
graf@lanl.gov, Los Alamos National Laboratory, Theoretical Division, United States
Nicholas J. Curro
Affiliation:
curro@lanl.gov, Los Alamos National Laboratory, MST Division, United States
Alexander J. Balatsky
Affiliation:
avb@lanl.gov, Los Alamos National Laboratory, Theoretical Division, United States
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Abstract

We calculated the Knight shift and spin-lattice relaxation rates of Pu-115 compounds assuming d-wave superconductivity in the presence of strong impurity scattering. We discuss the implications for recent measurements of the spin-lattice relaxation rate in the Pu-115 compound PuRhGa5 by Sakai and coworkers [J. Phys. Soc. Jpn. 74, 1710 (2005)] and present a prediction for the corresponding Knight shift. In addition, we noticed a significant round-off of the spin-lattice relaxation rate 1/T1 just above the superconducting transition temperature that is not observed in the sister compound PuCoGa5. It appears that in PuRhGa5 superconductivity is mediated by spin fluctuations, too. This provides additional support to the scenario of superconducting pairing mediated by spin fluctuations in the Pu-115 compounds similar to the Ce-115 compounds and the high-temperature copper-oxide superconductors.

Keywords

superconductingactinidenuclear magnetic resonance (NMR)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 893: Symposium JJ – Actinides 2005 – Basic Science, Applications and Technology , 2005 , 0893-JJ02-04
Copyright
Copyright © Materials Research Society 2006

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References

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