Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 78, Issue 7, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.78.074701
Keywords
d-vector of Sr2RuO4; spin-orbit coupling; triplet superconductivity
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) [17071007]
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The anisotropy of the d-vector of the spin-triplet superconductor Sr2RuO4 is investigated on the basis of a d-p model where the Coulomb interaction U-pp at the O site is taken into account together with U-dd at the Ru site. It is shown in the third-order perturbation for the pairing interaction that U-pp induces the spin-triplet pairing of (sin p(x) + i sin p(y)) symmetry. The piaring State with the d-vector in the RuO2 plane is stabilized by the atomic spin-orbit interaction and Hund's rule coupling at the Ru site, in contrast to the result based on the multiband Hubbard model without U-pp. This result is consistent with that obtained by the Knight shift measurement.
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