title: Spin-orbit fluctuations in frustrated heavy-fermion metal LiV(2)O(4).
abstract: Spin fluctuations were studied over a wide momentum (ℏQ) and energy (E) space in the frustrated d-electron heavy-fermion metal LiV_{2}O_{4} by time-of-flight inelastic neutron scattering. We observed the overall Q-E evolutions near the characteristic Q=0.6  Å^{-1}  peak and found another weak broad magnetic peak around 2.4  Å^{-1}. The data are described by a simple response function, a partially delocalized magnetic form factor, and antiferromagnetic short-range spatial correlations, indicating that heavy-fermion formation is attributable to spin-orbit fluctuations with orbital hybridization.
authors.affiliation: Department of Physics, Tohoku University, Aoba, Sendai 980-8578, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Tomiyasu
authors.affiliation: Department of Physics, Tohoku University, Aoba, Sendai 980-8578, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Iwasa
authors.affiliation: Department of Chemistry, Kyoto University, Kyoto 606-8502, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Ueda
authors.affiliation: RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Niitaka
authors.affiliation: Department of Physics, University of Tokyo, Hongo 113-0033, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Takagi
authors.affiliation: J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1106, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Ohira-Kawamura
authors.affiliation: J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1106, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kikuchi
authors.affiliation: J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1106, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Inamura
authors.affiliation: J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1106, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Nakajima
authors.affiliation: Institute of Materials Structure Science, High Energy Accelerator Research Organization, Oho, Tsukuba 305-0801, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Yamada