2002/08/30 by T. Scopigno, A. Filipponi, M. Krisch +4 · 1 citation
Materials Science · Physics and Astronomy · #Condensed matter physics #Dynamic structure factor #Gallium #Inelastic neutron scattering #Inelastic scattering #Material Dynamics and Properties #Materials science #Monatomic ion #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Scattering #Spectroscopy and Quantum Chemical Studies #Structure factor #Valence (chemistry) #cond-mat.dis-nn #van der Waals force
paper · pdf · doi:10.1103/physrevlett.89.255506
LaTex format, 11 pages, 4 EncapsulatedPostScript figures
arxiv created 2002/08/30 · openalex publication_date 2002/12/03 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The microscopic dynamics in liquid gallium at melting has been studied by inelastic x-ray scattering. We demonstrate the existence of acousticlike modes up to wave vectors above one-half of the first maximum of the static structure factor, at variance with earlier results from inelastic neutron scattering [F. J. Bermejo et al., Phys. Rev. E 49, 3133 (1994)]. Despite structural (extremely rich polymorphism) and electronic (mixed valence) peculiarities, the collective dynamics is strikingly similar to the one of van der Waals and metallic fluids. This result speaks in favor of the universality of the short time dynamics in monatomic liquids rather than of system-specific dynamics.