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APS » Journals » Phys. Rev. Lett. » Volume 39 » Issue 19
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Phys. Rev. Lett. 39, 1201–1205 (1977)

Universal Jump in the Superfluid Density of Two-Dimensional Superfluids

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David R. Nelson*
Department of Physics, Harvard University, Cambridge, Massachusetts 02138

J. M. Kosterlitz
Department of Mathematical Physics, University of Birmingham, Birmingham B15 2TT, England

Received 16 September 1977; published in the issue dated 7 November 1977

We observe that recent theories of phase transitions in the two-dimensional XY model predict a universal jump in the superfluid density of 4He films as Tc is approached from below. Specifically, we find that limT→Tc-ρs(T)/T=3.52×10-9 g/cm2°K. Analogous results should hold for two-dimensional planar magnets and liquid crystals.

© 1977 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.39.1201
DOI:
10.1103/PhysRevLett.39.1201
PACS:

*Work supported by a Junior Fellowship, Harvard Society of Fellows.

 
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