Dynamic Lattice Distortions in Sr$_2$RuO$_4$: A microscopic study by perturbed angular correlation (TDPAC) spectroscopy

S. N. Mishra; M. Rots; S. Cottenier

Dynamic Lattice Distortions in Sr$_2$RuO$_4$: A microscopic study by perturbed angular correlation (TDPAC) spectroscopy

Strongly Correlated Electrons 2007-05-23 v1 Materials Science

Authors: S. N. Mishra , M. Rots , S. Cottenier

Abstract

Applying time differential perturbed angular correlation (TDPAC) spectroscopy and \emph{ab initio} calculations, we have investigated possible lattice instabilities in Sr $_{2}$ RuO $_{4}$ by studying the electric quadrupole interaction of a $^{111}$ Cd probe at the Ru site. We find evidence for a dynamic lattice distortion, revealed from the observations of: (i) a rapidly fluctuating electric-field gradient (EFG) tensor of which the main component decreases with decreasing temperature, and (ii) a monotonic increase of the EFG asymmetry ( $\eta$ ) below 300 K. We argue that the observed dynamic lattice distortion is caused by strong spin fluctuations associated with the inherent magnetic instability of Sr $_{2}$ RuO $_{4}$ .

Keywords

phase transitions

Cite

@article{arxiv.cond-mat/0701068,
  title  = {Dynamic Lattice Distortions in Sr$_2$RuO$_4$: A microscopic study by perturbed angular correlation (TDPAC) spectroscopy},
  author = {S. N. Mishra and M. Rots and S. Cottenier},
  journal= {arXiv preprint arXiv:cond-mat/0701068},
  year   = {2007}
}

Comments

6 pages, 2 figures, 3 tables

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