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Electrical triggering of metal-insulator transition in nanoscale vanadium oxide junctions
被引:0
|作者:
Ruzmetov, Dmitry
[1
]
Gopalakrishnan, Gokul
[1
]
Deng, Jiangdong
[2
]
Narayanamurti, Venkatesh
[1
]
Ramanathan, Shriram
[1
]
机构:
[1] Harvard School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States
[2] Center for Nanoscale Systems, Harvard University, Cambridge, MA 02138, United States
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200 nm diameter Au contacts were fabricated by e-beam lithography on sputtered thin film vanadium oxide grown on conducting substrates and current perpendicular to plane electron transport measurements were performed with a conducting tip atomic force microscope. Sharp jumps in electric current were observed in the I-V characteristics of the nano- VO2 junctions and were attributed to the manifestation of the metal-insulator transition. The critical field and dielectric constant were estimated from quantitative analysis of the current-voltage relationship and compared with reported values on micrometer and larger size scale devices. These results are of potential relevance to novel oxide electronics utilizing metal-insulator transitions. © 2009 American Institute of Physics;
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