Physics – Condensed Matter – Materials Science
Scientific paper
2010-07-27
Physics
Condensed Matter
Materials Science
This paper has been withdrawn by the authors. We would like to withdraw the paper since we arrived at different conclusion bas
Scientific paper
The single crystal VO2, exihibiting a first-order metal-insulator transition (MIT) at 67.2 degrees C and an insulator-insulator transition (IIT) at ~49.7 degrees C, is grown. From synchrotron-based x-ray microdiffraction analysis, the IIT shows structural phase transition (SPT) of monoclinic M2 to M1 phases while the MIT displays M1 to rutile R phases. The IIT exhibits percolative SPT while the MIT shows abrupt transition width of < 0.02 degrees C, supporting Mott's prediction. The MIT occurs non-percolatively with a sharp boundary between R and M1 phases. The MIT onset temperature shows significant variation.
Chen Kaiyou
Dejoie Catherine
Grass Michael E.
Ju Honglyoul
Kunz Martin
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