Critical temperature and critical current of thin-film superfluid3He

Autor:	R. R. Turkington, S. C. Steel, R. F. Harris-Lowe, P. Zawadski, J. G. Daunt, J. P. Harrison, A. S. Sachrajda
Rok vydání:	1988
Předmět:	Physics Phase transition Condensed matter physics Transition temperature Ginzburg–Landau theory General Materials Science Thin film Electric current Microscopic theory Condensed Matter Physics Atomic and Molecular Physics and Optics Order of magnitude Volumetric flow rate
Zdroj:	Journal of Low Temperature Physics. 70:547-568
ISSN:	1573-7357 0022-2291
DOI:	10.1007/bf00682165
Popis:	Superfluid3He film flow over the rim of a copper beaker has been measured. The flow rate was measured as a function of temperature and as a function of depth of3He below the rim or film thickness at the rim. The critical current, calculated from the flow rate, varied as (1 −T/T p )3/2 as expected for pair-breaking;T p is a film-thickness-dependent critical temperature. However, the magnitude of the current was an order of magnitude smaller than expected for pair-breaking, in agreement with other experiments that have demonstrated a lower dissipation mechanism in superfluid3He. The suppression of the critical temperatureT p /T b , whereT b =0.93 mK is the bulk3He transition temperature, varied from 0.93 to 0.7 as the film thickness at the rim varied from 120 to 90 nm. These ratios are larger than expected from Ginzburg-Landau or microscopic theory of superfluid3He-B.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f65bb10086c212fd2461863c4ae77d65 https://doi.org/10.1007/bf00682165 Zobrazit plný text záznamu Full text from SpringerLink