Superflows and superfluidity

Journal Article · Tue Jun 01 04:00:00 EDT 1982 · Sov. Phys. - Usp. (Engl. Transl.); (United States)

DOI:https://doi.org/10.1070/PU1982v025n06ABEH004564· OSTI ID:6368295

Sonin, E B

The basic concepts of the theory of mass superflows in a superfluid are presented. The stability of such flows with respect to the creation and growth of linear defects (superfluid vortices), the relationship between superflows and the existence of long-range order, and the possible occurrence of persistent flows in one- and two-dimensional systems are discussed. Some analogs of the mass superflows in a superfluid are also examined: spin superflows in magnetically ordered systems having an easy-plane anisotropy and the current states of a Bose condensate of electron-hole pairs. The physical meaning of such ''flows'' is discussed, and a theory for their stability is derived from the calculated probability for the creation of the linear defects which are analogs of superfluid vortices. There is a discussion of the applicability of the theory of spin superflows to several experiments on the magnetic properties of the A phase of superfluid helium-3 and to a possibility which follows from this theory: that domain walls might be generated in the interior of a sample of an easy-plane magnetically ordered material and that the motion of these walls might be controlled by fields applied to the surface of the sample.

• Research Organization: A. F. Ioffe Physicotechnical Institute, Academy of Sciences of the USSR, Leningrad
• OSTI ID: 6368295
• Journal Information: Sov. Phys. - Usp. (Engl. Transl.); (United States), Journal Name: Sov. Phys. - Usp. (Engl. Transl.); (United States) Vol. 25:6; ISSN SOPUA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
ANISOTROPY
FLUID FLOW
MAGNETIC FIELDS
PARTICLE PROPERTIES
SPIN
STABILITY
SUPERFLUIDITY
VORTEX FLOW