Metal insulator transition characteristics of macro-size single domain VO2 crystals |
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| Authors: | Bongjin Simon Mun Joonseok Yoon Sung-Kwan Mo Kai Chen Nobumichi Tamura Catherine Dejoie |
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| Institution: | 1. Department of Applied Physics , Hanyang University , Ansan , Republic of Korea;2. Ertl Center for Electrochemistry and Catalysis, Gwangju Institute of Science and Technology , Gwangju , Republic of Korea;3. Department of Physics , Yonsei University , Seoul , Republic of Korea;4. Advanced Light Source, Lawrence Berkeley National Laboratory , Berkeley , USA;5. Advanced Light Source, Lawrence Berkeley National Laboratory , Berkeley , USA;6. Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano), State Key Laboratory for Mechanical Behavior of Materials , Xi'an Jiaotong University , Xi'an , China |
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| Abstract: | The metal insulator transition (MIT) characteristics of macro-size single-domain VO2 crystal were investigated. At the MIT, the VO2 crystal exhibited a rectangular shape hysteresis curve, a large change in resistance between the insulating and the metallic phases, in the order of ～105, and a small transition width (i.e. temperature difference before and after MIT) as small as 10?3°C. These MIT characteristics of the VO2 crystals are discussed in terms of phase boundary motion and the possibility of controlling the speed of the phase boundary, with change in size of crystal, is suggested. |
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| Keywords: | metal insulator transition VO2 optical microscopy phase boundary |
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