title: Epitaxial and Smooth Films of a-Axis YBa2Cu3O7.
abstract: YBa(2)Cu(3)O(7) films have been grown epitaxially on SrTiO(3) (100) and LaAlO(3) (100) substrates with nearly pure a-axis orientation and with transition temperature T(c) (R = 0) of 85 K. A unique feature of these films is their smooth surface. These smooth surfaces enable the growth of short-period superlattices with well-defined modulations. The films are untwinned and the grains grow with their c-axis along one of two perpendicular directions on the substrate ([100] or [010]). The fabrication of sandwich-type Josephson junctions with good characteristics may now be possible because unlike c-axis-oriented films, the superconducting coherence length of these smooth films is appreciably large perpendicular to their surfaces.
authors.forename: C B
authors.initials: CB
authors.lastname: Eom
authors.forename: A F
authors.initials: AF
authors.lastname: Marshall
authors.forename: S S
authors.initials: SS
authors.lastname: Laderman
authors.forename: R D
authors.initials: RD
authors.lastname: Jacowitz
authors.forename: T H
authors.initials: TH
authors.lastname: Geballe