Spatiotemporal characterization of the field-induced insulator-to-metal transition

doi:10.1126/science.abd9088

GSTDTAP > 气候变化

DOI	10.1126/science.abd9088
	Spatiotemporal characterization of the field-induced insulator-to-metal transition
	Javier del Valle; Nicolas M. Vargas; Rodolfo Rocco; Pavel Salev; Yoav Kalcheim; Pavel N. Lapa; Coline Adda; Min-Han Lee; Paul Y. Wang; Lorenzo Fratino; Marcelo J. Rozenberg; Ivan K. Schuller
	2021-08-20
发表期刊	Science
出版年	2021
英文摘要	Resistive switching is a process in which the electrical resistance of a sample changes abruptly in response to a voltage pulse, often by orders of magnitude. This process is at the heart of many neuromorphic computing approaches but visualizing it in both space and time is tricky. del Valle et al. monitored the resistive switching in three different vanadium oxide compounds by measuring time- and space-resolved optical reflectivity (see the Perspective by Hilgenkamp and Gao). A characteristic conducting filament was quickly nucleated on the inhomogeneities in the sample and then propagated due to Joule heating. Science , abd9088, this issue p. [907][1]; see also abh2231, p. [854][2] Many correlated systems feature an insulator-to-metal transition that can be triggered by an electric field. Although it is known that metallization takes place through filament formation, the details of how this process initiates and evolves remain elusive. We use in-operando optical reflectivity to capture the growth dynamics of the metallic phase with space and time resolution. We demonstrate that filament formation is triggered by nucleation at hotspots, with a subsequent expansion over several decades in time. By comparing three case studies (VO2, V3O5, and V2O3), we identify the resistivity change across the transition as the crucial parameter governing this process. Our results provide a spatiotemporal characterization of volatile resistive switching in Mott insulators, which is important for emerging technologies, such as optoelectronics and neuromorphic computing. [1]: /lookup/doi/10.1126/science.abd9088 [2]: /lookup/doi/10.1126/science.abh2231
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/336033
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Javier del Valle,Nicolas M. Vargas,Rodolfo Rocco,et al. Spatiotemporal characterization of the field-induced insulator-to-metal transition[J]. Science,2021.
APA	Javier del Valle.,Nicolas M. Vargas.,Rodolfo Rocco.,Pavel Salev.,Yoav Kalcheim.,...&Ivan K. Schuller.(2021).Spatiotemporal characterization of the field-induced insulator-to-metal transition.Science.
MLA	Javier del Valle,et al."Spatiotemporal characterization of the field-induced insulator-to-metal transition".Science (2021).