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Dynamic lattice distortions in Sr2RuO4: microscopic studies by perturbed angular correlation spectroscopy and ab initio calculations

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Abstract
Applying time differential perturbed angular correlation (TDPAC) spectroscopy and ab initio calculations, we have investigated possible lattice instabilities in Sr2RuO4 by studying the electric quadrupole interaction of a Cd-111 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 showing non-Arrhenius relaxation, (ii) an anomalous temperature dependence of the quadrupole interaction frequency, and (iii) 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 in Sr2RuO4.
Keywords
SUPERCONDUCTOR SR2RUO4, QUADRUPOLE INTERACTIONS, STOCHASTIC-MODEL, APPROXIMATION, FLUCTUATIONS, BEHAVIOR, METALS, NMR, ELECTRIC-FIELD GRADIENT

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Chicago
Mishra, SN, M Rots, and Stefaan Cottenier. 2010. “Dynamic Lattice Distortions in Sr2RuO4: Microscopic Studies by Perturbed Angular Correlation Spectroscopy and Ab Initio Calculations.” Journal of Physics-condensed Matter 22 (38).
APA
Mishra, SN, Rots, M., & Cottenier, S. (2010). Dynamic lattice distortions in Sr2RuO4: microscopic studies by perturbed angular correlation spectroscopy and ab initio calculations. JOURNAL OF PHYSICS-CONDENSED MATTER, 22(38).
Vancouver
1.
Mishra S, Rots M, Cottenier S. Dynamic lattice distortions in Sr2RuO4: microscopic studies by perturbed angular correlation spectroscopy and ab initio calculations. JOURNAL OF PHYSICS-CONDENSED MATTER. 2010;22(38).
MLA
Mishra, SN, M Rots, and Stefaan Cottenier. “Dynamic Lattice Distortions in Sr2RuO4: Microscopic Studies by Perturbed Angular Correlation Spectroscopy and Ab Initio Calculations.” JOURNAL OF PHYSICS-CONDENSED MATTER 22.38 (2010): n. pag. Print.
@article{1069834,
  abstract     = {Applying time differential perturbed angular correlation (TDPAC) spectroscopy and ab initio calculations, we have investigated possible lattice instabilities in Sr2RuO4 by studying the electric quadrupole interaction of a Cd-111 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 showing non-Arrhenius relaxation, (ii) an anomalous temperature dependence of the quadrupole interaction frequency, and (iii) 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 in Sr2RuO4.},
  articleno    = {385602},
  author       = {Mishra, SN and Rots, M and Cottenier, Stefaan},
  issn         = {0953-8984},
  journal      = {JOURNAL OF PHYSICS-CONDENSED MATTER},
  keyword      = {SUPERCONDUCTOR SR2RUO4,QUADRUPOLE INTERACTIONS,STOCHASTIC-MODEL,APPROXIMATION,FLUCTUATIONS,BEHAVIOR,METALS,NMR,ELECTRIC-FIELD GRADIENT},
  language     = {eng},
  number       = {38},
  pages        = {8},
  title        = {Dynamic lattice distortions in Sr2RuO4: microscopic studies by perturbed angular correlation spectroscopy and ab initio calculations},
  url          = {http://dx.doi.org/10.1088/0953-8984/22/38/385602},
  volume       = {22},
  year         = {2010},
}

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