Effect of Ti substitution on the residual resistivity in the spin-triplet superconductor Sr2RuO4

We report the substitution effect of nonmagnetic Ti4+ for Ru4+ on the in-plane resistivity of Sr2Ru1−xTixO4 with x from 0 (spin-triplet superconductor) to 0.03 (the border of the magnetically ordered phase). The superconductivity is suppressed by a small amount of Ti with x∼10−3 reflecting the extre...

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Bibliographic Details
Published in:	Physica. B, Condensed matter Vol. 312-313; pp. 803 - 804
Main Authors:	Kikugawa, N., Saita, S., Minakata, M., Maeno, Y.
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-03-2002
Subjects:	Impurity scattering Sr2RuO4 Unitarity limit Unitarity limit Sr2RuO4 Impurity scattering
Online Access:	Get full text
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Summary:	We report the substitution effect of nonmagnetic Ti4+ for Ru4+ on the in-plane resistivity of Sr2Ru1−xTixO4 with x from 0 (spin-triplet superconductor) to 0.03 (the border of the magnetically ordered phase). The superconductivity is suppressed by a small amount of Ti with x∼10−3 reflecting the extreme sensitivity to translational symmetry breaking. In addition, the in-plane residual resistivity is proportional to x in quantitative agreement with the isotropic scattering in the unitarity limit in a two-dimensional system. This indicates that the nonmagnetic impurity in Sr2RuO4 acts as a strong potential scatterer, similar to the Zn impurity in the cuprates.
ISSN:	0921-4526 1873-2135
DOI:	10.1016/S0921-4526(01)01208-X