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Title: Synthesis and electrical behavior of VO2 thin films grown on SrRuO3 electrode layers

Journal Article · · Journal of Vacuum Science and Technology A
DOI:https://doi.org/10.1116/6.0001798· OSTI ID:1961586

VO2 thin films were grown on conducting oxide underlayer SrRuO3 buffered SrTiO3 (111) and Si/SiO2 substrates, respectively, using sputtering. X-ray diffraction phi-scans revealed the epitaxial nature of the VO2 films grown on SrRuO3 buffered SrTiO3 and polycrystalline structure for films grown on SrRuO3 buffered Si/SiO2. X-ray photoelectron spectroscopy confirms a dominant presence of V4+ in both films and establishes a high-quality growth of single-phase VO2 films. Temperature and electric-field driven metal-insulator-transition in both the in-plane and out-of-plane configurations were investigated. Depending on the configuration, the resistance change across the metal-insulator-transition varies from a factor of 1.57–3. The measured resistance in each state as well as the magnitude of resistance change were similar during temperature and electric-field driven metal-insulator-transition. To shed light on the suppressed metal-insulator-transition characteristics due to the current shunting effect from conducting SrRuO3 bottom electrode, a distributed resistance network model is proposed and benchmarked against reports from the literature. Here, the results demonstrate the growth of high-quality VO2 on conducting SrRuO3 layers and their electrical behavior, which is of particular interest for all-oxide electronic devices utilizing phase transitions such as resistive memory and neuromorphic oscillators.

Research Organization:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0021118
OSTI ID:
1961586
Alternate ID(s):
OSTI ID: 1873032
Journal Information:
Journal of Vacuum Science and Technology A, Vol. 40, Issue 4; ISSN 0734-2101
Publisher:
American Vacuum Society / AIPCopyright Statement
Country of Publication:
United States
Language:
English

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  • Montero, José; Ji, Yu-Xia; Li, Shu-Yi
  • Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena, Vol. 33, Issue 3 https://doi.org/10.1116/1.4918714
journal May 2015
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