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Inelastic neutron scattering study of the magnetic fluctuations in Sr$_2$RuO$_4$ | | 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
; | | Date: |
17 May 2011 | | Abstract: | By performing time-of-flight neutron scattering measurements on a large
amount of single crystals of Sr$_2$RuO$_4$, we studied 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 at around $mathbf{Q}_ ext{c}=(0.3,0.3)$ up to at least
$hbaromega=80$ meV. In addition, our data also show strong magnetic
fluctuations that exist on the ridges connecting the IC peaks around the
$(pi,pi)$ point rather than around the $Gamma$ 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. | | Source: | arXiv, 1105.3352 | | Services: | Forum | Review | PDF | Favorites | |
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