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TT: Tiefe Temperaturen
TT 6: Postersitzung I: Josephsonkontakte und SQUIDs, Supraleitung: Theorie, Korrelierte Elektronen, Niederdimensionale Systeme, Magnetotransport, Quantenhalleffekt, Kohlenstoff-Nanoröhrchen, Quantenflüssigkeiten
TT 6.73: Poster
Monday, March 26, 2001, 14:30–17:00, Rang S\ 3
Search for materials and techniques for preparation superfluid weak link — •S. Pereverzev and G.Eska — Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth
We report a technique for preparation of 15 nm thick free-standing tight membranes from nitrocellulose. We describe how 15 nm holes could be made in those membranes by bombardment with heavy ions. The resulting nanostructure could be used as a weak link (Josephson junction) for superfluid 3He or for superfluid 4He at a temperature close to the λ-transition. 0.005 cm We report results of our evaluations of materials which are in use for gas separation and hyperfiltration (reverse osmotic) membranes and also of free-standing diamond like carbon (DLC) membranes. Perspectives of making 10 nm thick free standing membranes with molecular size pores are discussed.