Spin fluctuations were studied over a wide momentum (ℏQ) and energy (E) space in the frustrated d-electron heavy-fermion metal LiV2O4 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.
@article{arxiv.1407.4237,
title = {Spin-orbit fluctuations in frustrated heavy-fermion metal LiV$_2$O$_4$},
author = {K. Tomiyasu and K. Iwasa and H. Ueda and S. Niitaka and H. Takagi and S. Ohira-Kawamura and T. Kikuchi and K. Nakajima and K. Yamada},
journal= {arXiv preprint arXiv:1407.4237},
year = {2015}
}