Self-consistent renormalization theory of spin fluctuations in paramagnetic spinel LiV2O4

Details Self-consistent renormalization theory of spin fluctuations in paramagnetic spinel LiV2O4 Self-consistent renormalization theory of spin fluctuations in paramagnetic spinel LiV2O4

2008-02-18

arxiv.org/abs/0802.2473v1

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 1 figure. accepted to PRB

Scientific paper

10.1103/PhysRevB.77.125126

A phenomenological description for the dynamical spin susceptibility $\chi({\bf q},\omega;T)$ observed in inelastic neutron scattering measurements on powder samples of LiV$_2$O$_4$ is developed in terms of the parametrized self-consistent renormalization (SCR) theory of spin fluctuations. Compatible with previous studies at $T\to 0$, a peculiar distribution in ${\bf q}$-space of strongly enhanced and slow spin fluctuations at $q \sim Q_c \simeq$ 0.6 $\AA^{-1}$ in LiV$_2$O$_4$ is involved to derive the mode-mode coupling term entering the basic equation of the SCR theory. The equation is solved self-consistently with the parameter values found from a fit of theoretical results to experimental data. For low temperatures, $T \lesssim 30$K, where the SCR theory is more reliable, the observed temperature variations of the static spin susceptibility $\chi(Q_c;T)$ and the relaxation rate $\Gamma_Q(T)$ at $q\sim Q_c$ are well reproduced by those suggested by the theory. For $T\gtrsim 30$K, the present SCR is capable in predicting only main trends in $T$-dependences of $\chi(Q_c;T)$ and $\Gamma_Q(T)$. The discussion is focused on a marked evolution (from $q \sim Q_c$ at $T\to 0$ towards low $q$ values at higher temperatures) of the dominant low-$\omega$ integrated neutron scattering intensity $I(q; T)$.

Affiliated with

Also associated with

No associations

Rating

Self-consistent renormalization theory of spin fluctuations in paramagnetic spinel LiV2O4 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Self-consistent renormalization theory of spin fluctuations in paramagnetic spinel LiV2O4, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-consistent renormalization theory of spin fluctuations in paramagnetic spinel LiV2O4 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-197846