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https://hdl.handle.net/2142/77399
Description
Title
Properties of the Helium-3 a-B Phase Boundary
Author(s)
Yip, Sungkit Frederick
Issue Date
1986
Department of Study
Physics
Discipline
Physics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Fluid and Plasma
Language
eng
Abstract
This thesis deals with various properties of the ('3)He A-B phase boundary. First a review of some static properties, the surface energy and Kapitza resistance, is given. Then the symmetry of the interface is discussed. It is pointed out that, due to the presence of the condensate, many symmetries are broken. The effects of this are discussed; in particular it is shown that a transverse force acting across the boundary will result if a temperature difference exists between the two bulk phases. Finally the dynamics of the phase boundary is discussed via a phenomenological equation of motion. The higher temperature dissipative mechanism is ascribed to the Andreev scattering of excitations with the boundary. The predicted terminal velocity of the interface when the phases are hypercooled is shown to agree with experiment. The lower temperature dissipative mechanism is proposed to be pair-breaking, and a saturation of the terminal velocity at low temperatures is predicted.
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