Electronic theory for the normal-state spin dynamics in Sr2RuO4: Anisotropy due to spin-orbit coupling

Article

关键词: TRIPLET SUPERCONDUCTOR SR2RUO4;    FLUCTUATIONS;    CONDUCTIVITY;    GAP;   

DOI  :  10.1103/PhysRevB.65.220502

来源: SCIE

【 摘 要 】

Using a three-band Hubbard Hamiltonian we calculate within the random-phase approximation the spin susceptibility, chi(q,omega), and nuclear magnetic resonance spin-lattice relaxation rate, 1/T-1, in the normal state of the triplet superconductor Sr2RuO4 and obtain quantitative agreement with experimental data. Most importantly, we find that due to spin-orbit coupling the out-of-plane component of the spin susceptibility chi(zz) becomes at low temperatures two times larger than the in-plane one. As a consequence, strong incommensurate antiferromagnetic fluctuations of the quasi-one-dimensional xz and yz bands point into the z-direction. Our results provide further evidence for the importance of spin fluctuations for triplet superconductivity in Sr2RuO4.

【 授权许可】

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