Published December 5, 2011 | Version v1
Journal article Metadata-only

Suppression of vacancy defects in epitaxial La-doped SrTiO3 films

Creators

  • 1. Carnegie Laboratory of Physics, SUPA, School of Engineering, Physics, and Mathematics, University of Dundee, Dundee DD1 4HN (United Kingdom)
  • 2. Materials Department, University of California, Santa Barbara, California 93106-5050 (United States)
  • 3. Universitaet Bundeswehr Muenchen, D-85577 Neubiberg (Germany)

Description

Variable energy positron annihilation lifetime spectroscopy of high-mobility La-doped SrTiO3 grown by molecular beam epitaxy found that the films contained sufficiently low concentrations of Sr vacancies and vacancy cluster defects to allow the observation of positron annihilation events from the perfect lattice. This enabled the concentrations of charged cation vacancies to be estimated, and these were found to be at least an order of magnitude below the La-dopant concentrations.

Additional details

Identifiers

DOI
10.1063/1.3664398;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
99
Journal Issue
23
Journal Page Range
p. 232905-232905.3
ISSN
0003-6951
CODEN
APPLAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
43116104
Subject category
S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ANNIHILATION; CARRIER MOBILITY; CATIONS; CRYSTAL GROWTH; CRYSTALS; DOPED MATERIALS; LANTHANUM; LAYERS; LIFETIME; MOLECULAR BEAM EPITAXY; POSITRONS; SPECTROSCOPY; STRONTIUM TITANATES; THIN FILMS; VACANCIES
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; CHARGED PARTICLES; CRYSTAL DEFECTS; CRYSTAL GROWTH METHODS; CRYSTAL STRUCTURE; ELEMENTARY PARTICLES; ELEMENTS; EPITAXY; FERMIONS; FILMS; INTERACTIONS; IONS; LEPTONS; MATERIALS; MATTER; METALS; MOBILITY; OXYGEN COMPOUNDS; PARTICLE INTERACTIONS; POINT DEFECTS; RARE EARTHS; STRONTIUM COMPOUNDS; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
(c) 2011 American Institute of Physics