Publication
Title
Mapping electronic reconstruction at the metal-insulator interface in $LaVO_{3}/SrVO_{3}$ heterostructures
Author
Abstract
 A (LaVO3)6/(SrVO3)(3) superlattice is studied with a combination of sub-A resolved scanning transmission electron microscopy and monochromated electron energy-loss spectroscopy. The V oxidation state is mapped with atomic spatial resolution enabling us to investigate electronic reconstruction at the LaVO3/SrVO3 interfaces. Surprisingly, asymmetric charge distribution is found at adjacent chemically symmetric interfaces. The local structure is proposed and simulated with a double channeling calculation which agrees qualitatively with our experiment. We demonstrate that local strain asymmetry is the likely cause of the electronic asymmetry of the interfaces. The electronic reconstruction at the interfaces extends much further than the chemical composition, varying from 0.5 to 1.2 nm. This distance corresponds to the length of charge transfer previously found in the (LaVO3)./(SrVO3). metal/insulating and the (LaAlO3)./(SrTiO3). insulating/insulating interfaces.
Language
English
Source (journal)
Physical review : B : condensed matter and materials physics. - Lancaster, Pa, 1998 - 2015
Publication
Lancaster, Pa : 2013
ISSN
1098-0121 [print]
1550-235X [online]
Volume/pages
88:15(2013), p. 1-6
Article Reference
155123
ISI
000326087100003
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
 Faculty/Department Research group Project info IFOX - Interfacing Oxides.Counting Atoms in Nanomaterials (COUNTATOMS).Exploring electron vortex beams (VORTEX).ESTEEM 2 - Enabling science and technology through European electron microscopy. Publication type Subject Affiliation Publications with a UAntwerp address