Neutron scattering investigations of the boson peak

  title={Neutron scattering investigations of the boson peak},
  author={U. Buchenau},
  journal={Condensed Matter Physics},
  • U. Buchenau
  • Published 1 November 2019
  • Physics
  • Condensed Matter Physics
Inelastic neutron scattering is not only capable of determining a generalized vibrational density of states around the boson peak of a glass, but can also be used to get information on the eigenvectors. The eigenvectors determine the dynamic structure factor, which is $Q^2S(Q)$ ($Q$ wavevector) for long wavelength sound waves. This enables the determination of the sound wave fraction below and at the boson peak, done for SiO$_2$, B$_2$O$_3$, polybutadiene and amorphous germanium. The… 
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