Journal of Low Temperature Physics

, Volume 105, Issue 1–2, pp 13–36 | Cite as

Critical behavior of liquid4He at negative pressures

  • C. E. Campbell
  • R. Folk
  • E. Krotscheck
Articles

Abstract

We examine the equation of state of liquid4He at negative pressures close to the spinodal density ϱs where the hydrodynamic speed of sound vanishes. The non-analytic behavior of the equation of state and the speed of sound in the vicinity of the spinodal density are calculated in two and in three dimensions; we find for the speed of sound the non-analytic behavior mcs2 ∼ (ϱ — ϱs)2/5 in three dimensions and mcs2∼[(ϱ-ϱs)/¦ln(ϱ-ϱs)¦]1/2 in two dimensions.

We then examine the low density regime numerically, using a semi-analytic microscopic theory. It is found that non-analytic exponents are visible only in a negligible density regime around the spinodal point. Estimates for the spinodal densities, and the range of critical fluctuations are provided.

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Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • C. E. Campbell
    • 1
  • R. Folk
    • 2
  • E. Krotscheck
    • 2
    • 3
  1. 1.School of Physics and AstronomyUniversity of MinnesotaMinneapolisUSA
  2. 2.Institut für Theoretische PhysikJohannes Kepler Universität LinzLinzAustria
  3. 3.Department of PhysicsTexas A&M UniversityCollege StationUSA

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