Spin-orbit fluctuations in frustrated heavy-fermion metal LiV$_2$O$_4$
  Spin fluctuations were studied over a wide momentum ($\hbar Q$) 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 $Q=0.6$ {\AA}$^{-1}$ peak and found another weak broad magnetic peak around 2.4 {\AA}$^{-1}$. The data are described by a simple response function, a highly itinerant magnetic form factor, and antiferromagnetic short-range spatial correlations, indicating that heavy-fermion formation is attributable to spin-orbit fluctuations with orbital hybridization. 
K. Tomiyasu, K. Iwasa, H. Ueda, S. Niitaka, H. Takagi, S.   Ohira-Kawamura, T. Kikuchi, K. Nakajima, and K. Yamada
cond-mat.str-el