He3 excitations in dilute mixtures with He4

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Abstract

The deviation of the He3 quasiparticle spectrum from the Landau-Pomeranchuk parabolic form, seen in neutron scattering, is shown to be accounted for by including the process of roton emission by He3 quasiparticles in a self-consistent calculation. The normal-fluid density and second-sound velocity (as functions of temperature and concentration of He3), calculated from this spectrum (which exhibits no He3 roton minimum) with no adjustable parameters, are in agreement with experiment.

Original languageEnglish (US)
Pages (from-to)2108-2115
Number of pages8
JournalPhysical Review B
Volume18
Issue number5
DOIs
StatePublished - 1978
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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