CAN THE UNIVERSAL JUMP BE OBSERVED IN 2-DIMENSIONAL XY MAGNETS.
JOURNAL OF APPLIED PHYSICS.
(pp. 5955 - 5957).
AMER INST PHYSICS
The universal jump in the spin-wave stiffness is a characteristic property of the Kosterlitz-Thouless-Berezinskii phase transition in an infinitely large 2D-XY magnet. It has recently been demonstrated [S. T. Bramwell and P. C. W. Holdsworth, J. Phys. Condens. Matt. 5, L53 (1993)] that finite-size rounding is much more important in two-dimensional than in three-dimensional systems. This is because the properties of the phase transition depend logarithmically, rather than algebraically, on the system size. Consequently, finite-size rounding will be dominant in any real, macroscopic 2D-XY magnet. How the rounded universal jump still exhibits observable universal properties is discussed.
|Title:||CAN THE UNIVERSAL JUMP BE OBSERVED IN 2-DIMENSIONAL XY MAGNETS|
|Event:||38th Annual Conference on Magnetism and Magnetic Materials (MMM 93)|
|Dates:||1993-11-15 - 1993-11-18|
|Keywords:||KOSTERLITZ-THOULESS TRANSITION, SUPERFLUID DENSITY, NEUTRON-SCATTERING, MODEL, PLANE, RENORMALIZATION, MAGNETIZATION, FERROMAGNET, TEMPERATURE, DEPENDENCE|
|UCL classification:||UCL > School of BEAMS
UCL > School of BEAMS > Faculty of Maths and Physical Sciences
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