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Raman scattering from spin fluctuations and phonons in the heavy-fermion superconductor UPt3

  • Author(s): Brenten, H;
  • Zirngiebl, E;
  • Wire, MS;
  • Blumenröder, S;
  • Pofahl, G;
  • Güntherodt, G;
  • Fisk, Z
  • et al.
Abstract

Quasielastic scattering from spin fluctuations has been observed in UPt3 by Raman spectroscopy. The experiments for wave vectors q≈0 show a nearly temperature independent linewidth for 5 K ≤ T ≤ 300 K Complementary to neutron scattering results this establishes the q independence of the spin relaxation rate, indicating the localized nature of the spin fluctuations. A Raman-active phonon near 79 cm-1 (10 meV) shows a drastic increase in line-width with decreasing temperature, demonstrating strong electron-phonon coupling. © 1987.

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