| 학회 |
한국재료학회 |
| 학술대회 |
2016년 봄 (05/18 ~ 05/20, 여수 디오션리조트 ) |
| 권호 |
22권 1호 |
| 발표분야 |
A. 전자/반도체 재료 분과 |
| 제목 |
Correlative effects of thermal heating and electric field on metal-insulator transition in tensile-strained vanadium dioxide nanobeams |
| 초록 |
We report the roles of thermal heating and electric field on the metal-insulator transition (MIT) of the VO2 nanobeams with an altered strain rate. From the electrical measurements, the degree of strain on the nanobeam can be identified by the hysteresis – the larger the width of the hysteresis is, the higher the amount of strain is. The threshold voltage (VTH) versus temperature analyses suggest the transition mechanisms of the VO2 nanobeam – a Mott transition leads to the insulator-to-metal transition while a joule heating triggers the metal-to-insulator transition. Interestingly, the Poole-Frenkel (PF) conduction appears in the highly strained nanobeam during both the insulator-to-metal transition and the metal-to-insulator transition, but the trends are diverging – the PF regime expands with decreasing temperature for the insulator-to-metal transition whereas it diminishes with decreasing temperature for the metal-to-insulator transition. Additionally, the stability of such insulating phases as M2 may be controllable by varying the applied voltage at the highly strained nanobeam. Our study may provide specific information on controlling the properties of the VO2 nanobeam applications such as sensors by altering temperature and voltage with a properly engineered strain. |
| 저자 |
김민우1, 김명진1, 이후철1, 홍웅기2, 김봉중1
|
| 소속 |
1광주과학기술원 신소재공학부, 2한국기초과학지원 (연) |
| 키워드 |
Vanadium dioxide; metal-insulator transition; nanobeam; thermal heating; electric filed; tensile strain
|
| E-Mail |
|
