Dresden 2003 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 20: Postersitzung IV (Mesoskopische Systeme, Supraleitung: Massivmaterialien, Bandleiter, Pinning, Vortexdynamik, Transporteigenschaften, Korngrenzen)

TT 20.36: Poster

Donnerstag, 27. März 2003, 14:30–19:00, P2c, P2d

Perpendicular transport properties of YBa₂Cu₃O_7−y/ PrBa₂ Cu_2.9Ga_0.1O_7−y multilayers — •Hernan Rodriguez and Hermann Adrian — Institut für Physik, Johannes Gutenberg Universität, 55099 Mainz

We investigate the electric transport properties perpendicular to the CO₂ planes of high quality (YBa₂Cu₃O_7−y)_n/(PrBa₂Cu_2.9Ga_0.1O_7−y) _m heterostructures deposited by high pressure DC sputtering. The samples were patterned with the standard photolitography method into a square junctions of 16× 16µ m² and 20× 20µ m². At low temperature the conductance-voltage characteritic exhibits a gap feature of 45mV for the (n=4:m=16) superlattice, this sample has nine junctions. At high dc bias voltage the di/dv−v curve becomes tiny structures which could be related to the periodicity, results for other superlattices and trilayers are discussed.