On the Problem of Metal-Insulator Transitions in Vanadium Oxides
| Autor: | N. A. Kuldin, Alexander Pergament, Andrey Velichko, G. B. Stefanovich |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Article Subject Condensed matter physics business.industry Vanadium chemistry.chemical_element Dielectric Effective nuclear charge Condensed Matter::Materials Science Paramagnetism Sesquioxide Semiconductor chemistry Mott Criterion Pentoxide Condensed Matter::Strongly Correlated Electrons business |
| Zdroj: | ISRN Condensed Matter Physics. 2013:1-6 |
| ISSN: | 2090-7400 |
| DOI: | 10.1155/2013/960627 |
| Popis: | The problem of metal-insulator transition is considered. It is shown that the Mott criterion aB(nc)1/3≈0.25 is applicable not only to heavily doped semiconductors but also to many other materials, including some transition-metal compounds, such as vanadium oxides (particularly, VO2 and V2O3). The low-temperature transition (“paramagnetic metal—antiferromagnetic insulator”) in vanadium sesquioxide is described on the basis of this concept in terms of an intervening phase, between metal and insulator states, with divergent dielectric constant and effective charge carrier mass. Recent communications concerning a possible “metal-insulator transition” in vanadium pentoxide are also discussed. |
| Databáze: | OpenAIRE |
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