Effects of magnetic and nonmagnetic impurities on the spin susceptibility of a noncentrosymmetrical superconductor: Application to CePt3Si

The combined effect of nonmagnetic and magnetic impurities on the spin susceptibility of a noncentrosymmetrical superconductor by considering a Cooper pairing model with a two-component order parameter composed of spin-singlet and spin-triplet pairing components is investigated. For clean supercondu...

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Bibliographic Details
Published in:Journal of applied physics 2013-10, Vol.114 (16)
Main Authors: Yavari, H, Mokhtari, M, Tamaddonpour, M
Format: Article
Language:English
Subjects:
Applied physics
Cleaning
Electrons
Energy gap
Impurities
Magnetic permeability
Order parameters
Temperature dependence
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Summary:The combined effect of nonmagnetic and magnetic impurities on the spin susceptibility of a noncentrosymmetrical superconductor by considering a Cooper pairing model with a two-component order parameter composed of spin-singlet and spin-triplet pairing components is investigated. For clean superconductor CePt3Si, the low-temperature dependence (T→0) of spin susceptibility is linear which suggests that the gap function has line nodes, consistent with our gap model. We will show that in the presence of magnetic impurities the susceptibility does not vanish even in the absence of spin orbit coupling and in the region where the energy gap still is finite, and in the low concentration of magnetic impurities the spin susceptibility at zero temperature is proportional to impurity concentration.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4827415