Impacto
Downloads
Downloads per month over past year
Ramírez, J. G. and Schmidt, Rainer and Sharoni, A. and Gómez, M. E. and Schuller, Ivan K. and Patiño, Edgar J. (2013) Ultra-thin filaments revealed by the dielectric response across the metal-insulator transition in VO_(2). Applied physics letters, 102 (6). ISSN 0003-6951
Preview |
PDF
879kB |
Official URL: http://dx.doi.org/10.1063/1.4792052
Abstract
Temperature dependent dielectric spectroscopy measurements on vanadium dioxide thin films allow us to distinguish between the resistive, capacitive, and inductive contributions to the impedance across the metal-insulator transition (MIT). We developed a single, universal, equivalent circuit model to describe the dielectric behavior above and below the MIT. Our model takes account of phase-coexistence of metallic and insulating regions. We find evidence for the existence at low temperature of ultra-thin threads as described by a resistor-inductor element. A conventional resistorcapacitor element connected in parallel accounts for the insulating phase and the dielectric relaxation.
| Item Type: | Article |
|---|---|
| Additional Information: | © 2013 American Institute of Physics. This work was supported by AFOSR Grant No. FA9550- 12-1-0381, COLCIENCIAS, CENM and “El Patrimonio Autónomo Fondo Nacional de Financiamiento para la Ciencia, la Tecnología y la Innovación Francisco José de Caldas” Contract RC—No. 275-2011, and ISF Grant No. 727/11. R.S. wishes to acknowledge a Ramón y Cajal Fellowship from the Ministerio de Ciencia e Innovación (MICINN) in Spain. E.J.P. wishes to acknowledge “Programa Nacional de Ciencias Básicas” COLCIENCIAS (No. 120452128168). During the publication process of this manuscript, out-of-plane impedance measurements were published on VO_(2) films grown on TiO_(2) substrates. These results also imply the coexistence of metallic and insulating phases. |
| Uncontrolled Keywords: | Vanadium dioxide; Film. |
| Subjects: | Sciences > Physics > Electricity Sciences > Physics > Electronics |
| ID Code: | 32500 |
| Deposited On: | 28 Jul 2015 09:47 |
| Last Modified: | 10 Dec 2018 14:58 |
Origin of downloads
Repository Staff Only: item control page
