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Electronic Theory for the Magnetic Anisotropy in Sr2RuO4

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Abstract

Using a three-band Hubbard Hamiltonian we calculated within the random-phase-approximation the spin susceptibility, χ(q, ω), and NMR spin-lattice relaxation rate 1/T 1, in the normal state of the triplet superconductor Sr2RuO4, and obtained quantitative agreement with experimental data. Most importantly, we found that because of spin–orbit coupling the out-of-plane component of the spin susceptibility χzz(q, ω) becomes two times larger than the in-plane one at low temperatures. We analyze in particular the role of the xy-band in the magnetic anisotropy.

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Authors and Affiliations

  1. Institut für Theoretische Physik, Freie Universität Berlin, D-14195, Berlin, Germany

    I. Eremin, D. Manske & K. H. Bennemann

  2. Physics Department, Kazan State University, 420008, Kazan, Russia

    I. Eremin

  3. Laboratoire de Physique des Solides, Universite d'Orsay, Batiment 510, 91400, Orsay, France

    J. R. Tarento

Authors
  1. I. Eremin
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  2. D. Manske
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  3. J. R. Tarento
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  4. K. H. Bennemann
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Eremin, I., Manske, D., Tarento, J.R. et al. Electronic Theory for the Magnetic Anisotropy in Sr2RuO4 . Journal of Superconductivity 15, 447–450 (2002). https://doi.org/10.1023/A:1021055104995

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