Publication
Title
Direct structural and spectroscopic investigation of ultrathin films of tetragonal CuO: Six-fold coordinated copper
Author
Abstract
Unlike other 3d transition metal monoxides (MnO, FeO, CoO, and NiO), CuO is found in a low-symmetry distorted monoclinic structure rather than the rocksalt structure. We report here of the growth of ultrathin CuO films on SrTiO3 substrates; scanning transmission electron microscopy was used to show the stabilization of a tetragonal rocksalt structure with an elongated c-axis such that c/a similar to 1.34 and the Cu-O-Cu bond angle similar to 180 degrees, pointing to metastable six-fold coordinated Cu. X-ray absorption spectroscopy demonstrates that the hole at the Cu site for the CuO is localized in 3d(x2-y2) orbital unlike the well-studied monoclinic CuO phase. The experimental confirmation of the tetragonal structure of CuO opens up new avenues to explore electronic and magnetic properties of six-fold coordinated Cu. Copyright (C) EPLA, 2014
Language
English
Source (journal)
Europhysics letters. - Paris
Publication
Paris : 2014
ISSN
0295-5075
Volume/pages
105:1(2014), p. 1-5
Article Reference
17003
ISI
000331197100015
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
[E?say:metaLocaldata.cgzprojectinf]
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
External links
Web of Science
Record
Identification
Creation 04.04.2014
Last edited 14.08.2017
To cite this reference