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 language||English (US)|
|Number of pages||8|
|Journal||Physical Review B|
|State||Published - 1978|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics