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dc.creatorCOLLINS, M.
dc.creatorAgnolet, Glenn
dc.creatorSASLOW, WM
dc.creatorKROTSCHECK, E.
dc.date.accessioned2012-09-19T20:00:31Z
dc.date.available2012-09-19T20:00:31Z
dc.date.issued1993
dc.identifier.citationM. 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.urihttp://dx.doi.org/10.1103/PhysRevB.47.8905
dc.identifier.urihttp://hdl.handle.net/1969.1/146757
dc.descriptionJournals published by the American Physical Society can be found at http://journals.aps.org/en
dc.description.abstractTorsional-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.isoen
dc.publisherAmerican Physical Society
dc.rightsThis 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.subject2-DIMENSIONAL HE-4 FILMSen
dc.subjectSUPERFLUID TRANSITIONen
dc.subjectHELIUM FILMSen
dc.subjectDYNAMICSen
dc.subjectPhysicsen
dc.titleInhomogeneous Broadening and the Kosterlitz-Thouless Transitionen
dc.typeArticleen
local.departmentPhysics and Astronomyen


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