1. Hyperbolic roton and solid nucleation in superfluid 4He.
- Author
-
Tomoki Minoguchi
- Subjects
- *
SUPERFLUIDITY , *SOLID-liquid interfaces - Abstract
The solidification model for superfluid 4He is reviewed, where the symmetry breaking order parameter η is appropriately defined and included in addition to the density change ξ. As a remarkable feature, the model explicitly shows that the instability to the solid is associated with the instability against the fluctuation of η, namely the softening of ‘hyperbolic roton’. The rate W of solid nucleation is calculated based on the model. In contrast to ξ, η is nonconserved quantity, and then it leads the novel exponents in W near the spinodal pressure. [Copyright &y& Elsevier]
- Published
- 2003
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