Can I read Correlative mapping of local hysteresis properties in VO$_2$ on EtoBox?

Correlative mapping of local hysteresis properties in VO$_2$ by Banguero, Melissa Alzate; Basak, Sayan; Raymond, Nicolas; Simmons, Forrest; Salev, Pavel; Schuller, Ivan K.; Aigouy, Lionel; Carlson, Erica W.; Zimmers, Alexandre is a scholarly article available to read on EtoBox.

What is Correlative mapping of local hysteresis properties in VO$_2$ about?

We have developed a new optical microscopy technique able to track micron-sized surface clusters as temperature is varied. Potential candidates for study include phase separated metal-insulator materials, ferroelectrics, and porous structures. Several key techniques (including autofocus, step motor/cross correlation alignments, single-pixel thresholding, pair connectivity correlation length and image convolution) were implemented in order to obtain a time series of thresholded images. Here, we apply this new method to probe the archetypal phase separated insulator-metal transition in VO$_2$. A precise time and temperature series of the insulator-metal transition was achieved, allowing us to construct for the first time in this material spatial maps of the transition temperature T$_c$. These maps reveal multiple interesting features such as fractal electronic patterns on micron scales, regions of the sample with an extremely large or nearly absent local hysteresis, a positive correlation between the T$_c$ value and the hysteresis width $\Delta$T$_c$, and high cycle-to-cycle reproducibility of the transition. These maps also allow for the identification of individual pixels with uniq

Author

Banguero, Melissa Alzate; Basak, Sayan; Raymond, Nicolas; Simmons, Forrest; Salev, Pavel; Schuller, Ivan K.; Aigouy, Lionel; Carlson, Erica W.; Zimmers, Alexandre

Published

2023

Language

EN