Inelastic neutron scattering study of the magnetic fluctuations in Sr 2RuO4

K. Iida, M. Kofu, N. Katayama, J. Lee, R. Kajimoto, Y. Inamura, M. Nakamura, M. Arai, Y. Yoshida, M. Fujita, K. Yamada, S. H. Lee

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By performing time-of-flight neutron scattering measurements on a large sample of single crystals of Sr2RuO4, we studied the detailed structure of the imaginary part of the dynamic spin susceptibility over a wide range of phase space. In the normal state at T=5 K, strong incommensurate (IC) peaks were clearly observed around Qc=(0.3,0.3) up to at least ω=80 meV. In addition, our data also show strong magnetic fluctuations that exist on the ridges connecting the IC peaks around the (π,π) point rather than around the Γ point. Our results are consistent with the semi-mean-field random phase approximation calculation for a two-dimensional Fermi liquid with a characteristic energy of 5.0 meV. Furthermore, the IC fluctuations were observed even at room temperature.

Original languageEnglish
Article number060402
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
Publication statusPublished - 2011 Aug 8


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