Spinodal Electronic Phase Separation in VO2

Credits/Names: 

Shi & Chen, Submitted to Nature Physics 2020.

NSF MRSEC DMR-1420620

Phase-field modeling shows possible emergence of a transient electronic phase separation in VO2 upon photoexcitation, a coupling of optical excitation and electronic structure. The phase separation occurs at the edge of the illuminated region, leading to modulated charge density and ionic displacement fields in that vicinity. The characteristic wavelength of the phase modulation increases with elevating temperature. These results shed important light on the phenomena of metal-insulator phase transitions, with promising potential for application in transformative electronic devices that operate by novel means.

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Year of Research Highlight: 
2019
IRG: 
IRG4 - Phototonic Assemblies