Strain engineering and one-dimensional organization of metal-insulator domains in single-crystal vanadium dioxide beams
| Autor: | D. R. Khanal, J. Cao, Jeffrey C. Grossman, Haimei Zheng, Junqiao Wu, D. F. Ogletree, Wen Fan, Varadharajan Srinivasan, Simon Huang, Elif Ertekin, Joanne Yim |
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| Rok vydání: | 2009 |
| Předmět: |
Phase transition
Materials science Colossal magnetoresistance Condensed matter physics Mott insulator Transition temperature Biomedical Engineering Bioengineering Condensed Matter Physics Atomic and Molecular Physics and Optics Mott transition Strain engineering Phase (matter) Condensed Matter::Strongly Correlated Electrons General Materials Science Electrical and Electronic Engineering Single crystal |
| Zdroj: | Nature nanotechnology. 4(11) |
| ISSN: | 1748-3395 |
| Popis: | Correlated electron materials can undergo a variety of phase transitions, including superconductivity, the metal-insulator transition and colossal magnetoresistance. Moreover, multiple physical phases or domains with dimensions of nanometres to micrometres can coexist in these materials at temperatures where a pure phase is expected. Making use of the properties of correlated electron materials in device applications will require the ability to control domain structures and phase transitions in these materials. Lattice strain has been shown to cause the coexistence of metallic and insulating phases in the Mott insulator VO(2). Here, we show that we can nucleate and manipulate ordered arrays of metallic and insulating domains along single-crystal beams of VO(2) by continuously tuning the strain over a wide range of values. The Mott transition between a low-temperature insulating phase and a high-temperature metallic phase usually occurs at 341 K in VO(2), but the active control of strain allows us to reduce this transition temperature to room temperature. In addition to device applications, the ability to control the phase structure of VO(2) with strain could lead to a deeper understanding of the correlated electron materials in general. |
| Databáze: | OpenAIRE |
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