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arXiv · 1407.4237

Spin-orbit fluctuations in frustrated heavy-fermion metal LiV$_2$O$_4$

K. Tomiyasu·K. Iwasa·H. Ueda·S. Niitaka·H. Takagi·S. Ohira-Kawamura·T. Kikuchi·K. Nakajima·K. Yamada
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Abstract

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.

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K. Tomiyasu, K. Iwasa, H. Ueda, S. Niitaka, H. Takagi, S. Ohira-Kawamura, T. Kikuchi, K. Nakajima, K. Yamada. 2014-07-16. Spin-orbit fluctuations in frustrated heavy-fermion metal LiV$_2$O$_4$. https://doi.org/10.1103/physrevlett.113.236402

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