Origin of the {Tc}-depression in ultrathin YBCO

Book · Fri Dec 30 23:00:00 EST 1994

OSTI ID:82843

Cieplak, M Z; Guha, S; Vadlamannati, S; Nien, C H; Lindenfeld, P ^[1]

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1. Rutgers Univ., Piscataway, NJ (United States)

Conductance measurements on YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (YBCO) between layers of Y{sub 1{minus}x}Pr{sub x}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} [(Y-Pr)BCO] show a transition from a bulk regime in the interior of the YBCO to a surface regime near the interfaces. The depression of the zero-resistance transition temperature in ultrathin YBCO is correlated with the depressed conductance in the surface layer. The results indicate that the changes are related to the presence of the interfaces, primarily to charge transfer between the layers, with little, if any, indication of a change in the intrinsic properties of the YBCO from bulk down to the thickness of a single unit cell.

• OSTI ID: 82843
• Report Number(s): CONF-940142--; ISBN 0-8194-1452-2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
EXPERIMENTAL DATA
HIGH-TC SUPERCONDUCTORS
LAYERS
PRASEODYMIUM OXIDES
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
TRANSITION TEMPERATURE
YTTRIUM OXIDES