View : 72 Download: 94

Visualization of local phase transition behaviors near dislocations in epitaxial VO2/TiO2 thin films

Title
Visualization of local phase transition behaviors near dislocations in epitaxial VO2/TiO2 thin films
Authors
Sohn, AhrumKanki, TeruoTanaka, HidekazuKim, Dong-Wook
Ewha Authors
김동욱
SCOPUS Author ID
김동욱scopus
Issue Date
2015
Journal Title
APPLIED PHYSICS LETTERS
ISSN
0003-6951JCR Link1077-3118JCR Link
Citation
vol. 107, no. 17
Publisher
AMER INST PHYSICS
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We investigated local phase transition behaviors in epitaxial VO2/TiO2 thin films using variable-temperature Kelvin probe force microscopy while spanning the metal-insulator transition (MIT). Fully strained thin films were almost free of grain boundaries. In contrast, thicker films had cracks (dislocations) caused by strain relaxation. The surface area fraction of the insulating phase near the dislocations was higher than that in other regions. Thicker films have complicated domain patterns; hence, the three-dimensional percolation model properly described the MIT behaviors. In contrast, the two-dimensional percolation model well explained the transition behaviors of uniformly strained thinner films. (C) 2015 AIP Publishing LLC.
DOI
10.1063/1.4934943
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
Files in This Item:
Visualization of local phase transition behaviors near dislocations in epitaxial VO2 TiO2 thin films.pdf(1.51 MB)Download
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE