Mott switching and structural transition in the metal phase of $VO_2$ nanodomain
| Autor: | Hyun-Tak Kim, Chang-Yong Kim, Jinchul Cho, Tetiana Slusar |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Structural phase
Condensed Matter - Materials Science Materials science Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Peierls transition Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Electronic Optical and Magnetic Materials Mott transition Metal Condensed Matter - Strongly Correlated Electrons visual_art Phase (matter) 0103 physical sciences Materials Chemistry Electrochemistry visual_art.visual_art_medium Structural transition 010306 general physics 0210 nano-technology Monoclinic crystal system |
| Popis: | $VO_2$ undergoes the insulator-metal transition (IMT) and monoclinic-rutile structural phase transition (SPT) near $67^oC$. The IMT switching has many applications. However, there is an unresolved issue whether the IMT is a Mott transition or a Peierls transition. This complication is caused by metal and insulator coexistence, which is an inherent property of the IMT region. Thus, the acquired data in the IMT region are averaged over the two phases in many experiments. We overcome the issue by probing the electronic state of the monoclinic structure and by introducing a model that accounts for the coexisting phases. We reveal the Mott IMT in the non-distorted monoclinic nanodomain between $55-63^oC$, and the distortion-assisted SPT above $60^oC$. 18 pages, 4 main figures, 5 supporting figures |
| Databáze: | OpenAIRE |
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