Monosteps on extremely flat YBa2Cu3O7−x surfaces grown by liquid-phase epitaxy
- 15 August 1994
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 65 (7) , 901-903
- https://doi.org/10.1063/1.112195
Abstract
We report the growth of extremely flat YBa2Cu3O7−x (YBCO) films onto NdGaO3 substrates by liquid‐phase epitaxy (LPE). Macroscopic growth spirals with large interstep distances (several μm) and with hollow cores are observed by optical (Nomarski) microscopy and by atomic force microscopy, in contrast to the microscopic spiral islands formed in epitaxy from the vapor phase. Typical step heights of LPE‐grown YBCO vary between monosteps (1.2 nm) and 7.2 nm. Extremely flat epitaxial YBCO surfaces with continuous step flow have been achieved. They are of interest for fundamental physical studies (gap, photoemission) and for a reliable high‐temperature superconductivity tunnel‐device technology.Keywords
This publication has 10 references indexed in Scilit:
- Liquid phase epitaxy of high-Tc superconductorsJournal of Crystal Growth, 1993
- On the flux growth and some properties of superconducting YBa2Cu3O7-ϰ single crystals and LPE filmsJournal of Crystal Growth, 1993
- Liquid phase epitaxy of YBa2Cu3O7−x on NdGaO3 and LaGaO3 substratesJournal of Crystal Growth, 1992
- Scanning tunneling microscopy study of different growth stages of YBa2Cu3O7−δ thin filmsPhysica C: Superconductivity and its Applications, 1992
- Problems in epitaxial growth of high-Tc superconductorsJournal of Crystal Growth, 1991
- High temperature Josephson devicesPhysica C: Superconductivity and its Applications, 1991
- Growth Mechanism of Sputtered Films of YBa 2 Cu 3 O 7 Studied by Scanning Tunneling MicroscopyScience, 1991
- Screw dislocations in high-Tc filmsNature, 1991
- Atomically flat LPE-grown facets seen by scanning tunneling microscopyJournal of Crystal Growth, 1982
- Transition to faceting in multilayer liquid phase epitaxy of GaAsApplied Physics Letters, 1980