dc.creator | COLLINS, M. | |
dc.creator | Agnolet, Glenn | |
dc.creator | SASLOW, WM | |
dc.creator | KROTSCHECK, E. | |
dc.date.accessioned | 2012-09-19T20:00:31Z | |
dc.date.available | 2012-09-19T20:00:31Z | |
dc.date.issued | 1993 | |
dc.identifier.citation | M. COLLINS, Glenn Agnolet, WM SASLOW and E. KROTSCHECK. Phys.Rev.B 47 8905-8909 1993."Copyright (1993) by the American Physical Society." | en |
dc.identifier.uri | http://dx.doi.org/10.1103/PhysRevB.47.8905 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/146757 | |
dc.description | Journals published by the American Physical Society can be found at http://journals.aps.org/ | en |
dc.description.abstract | Torsional-oscillator studies of very thin He-4 films have found nonuniversal behavior of the superfluid response as a function of coverage. The temperature width of the superfluid transition region is nonmonotonic in the areal density n and exhibits cusplike variations at half of the layering period. We explore the assumption that this additional broadening is caused by macroscopic inhomogeneities in the substrate potential; such a theory for inhomogeneous broadening can be constructed from the Kosterlitz-Nelson relation between the superfluid areal density n(s) and the transition temperature T(c) by determining the theoretical ''sensitivity'' S of n(s) to variations in the strength of the substrate potential. For substrate models that are atomically uniform, a simple microscopic hypernetted-chain calculation (without either ''elementary diagrams'' or three-body correlations, but with an optimized Jastrow function) finds this sensitivity always to be of the same sign, and yields reasonable order-of-magnitude agreement with experiment. However, models for which the sensitivity does not change sign appear to be incapable of yielding either the cusps or the half-periodicity of the data. We suggest that these properties may occur with a more recently developed (and more sophisticated) version of hypernetted-chain theory, wherein ''elementary diagrams'' and three-body correlations are incorporated. | en |
dc.language.iso | en | |
dc.publisher | American Physical Society | |
dc.rights | This work is archived in the Texas A&M Digital Repository with the express permission of the rights holder (commonly but not always the publisher). A copy of the permission document is on file with the Texas A&M University Libraries. | en |
dc.subject | 2-DIMENSIONAL HE-4 FILMS | en |
dc.subject | SUPERFLUID TRANSITION | en |
dc.subject | HELIUM FILMS | en |
dc.subject | DYNAMICS | en |
dc.subject | Physics | en |
dc.title | Inhomogeneous Broadening and the Kosterlitz-Thouless Transition | en |
dc.type | Article | en |
local.department | Physics and Astronomy | en |