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Electronic Theory for the Magnetic Anisotropy in Sr2RuO4 |
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| Authors: | I. Eremin D. Manske J. R. Tarento K. H. Bennemann |
| Affiliation: | 1. Institut für Theoretische Physik, Freie Universit?t Berlin, D-14195, Berlin, Germany 2. Physics Department, Kazan State University, 420008, Kazan, Russia 3. Laboratoire de Physique des Solides, Universite d'Orsay, Batiment 510, 91400, Orsay, France |
| 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 χ zz (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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