Resolving transitions in the mesoscale domain configuration in VO 2 using laser speckle pattern analysis

Katyayani Seal; Amos Sharoni; Jamie M. Messman; Bradley S. Lokitz; Robert W. Shaw; Ivan K. Schuller; Paul C. Snijders; Thomas Z. Ward

doi:10.1038/srep06259

Resolving transitions in the mesoscale domain configuration in VO 2 using laser speckle pattern analysis

Katyayani Seal, Amos Sharoni, Jamie M. Messman, Bradley S. Lokitz, Robert W. Shaw, Ivan K. Schuller, Paul C. Snijders, Thomas Z. Ward

Center for Nanophase Matls Sciences

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The configuration and evolution of coexisting mesoscopic domains with contrasting material properties are critical in creating novel functionality through emergent physical properties. However, current approaches that map the domain structure involve either spatially resolved but protracted scanning probe experiments without real time information on the domain evolution, or time resolved spectroscopic experiments lacking domain-scale spatial resolution. We demonstrate an elegant experimental technique that bridges these local and global methods, giving access to mesoscale information on domain formation and evolution at time scales orders of magnitude faster than current spatially resolved approaches. Our straightforward analysis of laser speckle patterns across the first order phase transition of VO 2 can be generalized to other systems with large scale phase separation and has potential as a powerful method with both spatial and temporal resolution to study phase separation in complex materials.

Original language	English
Article number	6259
Journal	Scientific Reports
Volume	4
DOIs	https://doi.org/10.1038/srep06259
State	Published - Sep 2 2014

Funding

Research supported by the US Department of Energy (DOE), Basic Energy Sciences (BES), Materials Sciences and Engineering Division, (PCS, TZW) and Chemical Sciences, Geosciences, and Biosciences Division (RWS). Ellipsometry measurements (JMM, BSL) were conducted at the Center for Nanophase Materials Sciences, which is sponsored at Oak Ridge National Laboratory by the Scientific User Facilities Division, Office of BES, US DOE. Partial support was also given by LDRD Program at ORNL (KS). Partial support was also given by, U.S. Department of Energy, BES-DMS funded by the Department of Energy’s Office of Basic Energy Science, under grant DE FG03 87ER-45332 (IKS). Partial support also given by Israel Science Foundation grant No. 727/11 (AS).

Funders	Funder number
Basic Energy Science	DE FG03 87ER-45332
US Department of Energy
U.S. Department of Energy
Basic Energy Sciences
Raymond Williams Society
Division of Materials Sciences and Engineering
Chemical Sciences, Geosciences, and Biosciences Division
Israel Science Foundation	727/11

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title = "Resolving transitions in the mesoscale domain configuration in VO 2 using laser speckle pattern analysis",

abstract = "The configuration and evolution of coexisting mesoscopic domains with contrasting material properties are critical in creating novel functionality through emergent physical properties. However, current approaches that map the domain structure involve either spatially resolved but protracted scanning probe experiments without real time information on the domain evolution, or time resolved spectroscopic experiments lacking domain-scale spatial resolution. We demonstrate an elegant experimental technique that bridges these local and global methods, giving access to mesoscale information on domain formation and evolution at time scales orders of magnitude faster than current spatially resolved approaches. Our straightforward analysis of laser speckle patterns across the first order phase transition of VO 2 can be generalized to other systems with large scale phase separation and has potential as a powerful method with both spatial and temporal resolution to study phase separation in complex materials.",

author = "Katyayani Seal and Amos Sharoni and Messman, {Jamie M.} and Lokitz, {Bradley S.} and Shaw, {Robert W.} and Schuller, {Ivan K.} and Snijders, {Paul C.} and Ward, {Thomas Z.}",

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AU - Seal, Katyayani

AU - Sharoni, Amos

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AU - Shaw, Robert W.

AU - Schuller, Ivan K.

AU - Snijders, Paul C.

AU - Ward, Thomas Z.

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AB - The configuration and evolution of coexisting mesoscopic domains with contrasting material properties are critical in creating novel functionality through emergent physical properties. However, current approaches that map the domain structure involve either spatially resolved but protracted scanning probe experiments without real time information on the domain evolution, or time resolved spectroscopic experiments lacking domain-scale spatial resolution. We demonstrate an elegant experimental technique that bridges these local and global methods, giving access to mesoscale information on domain formation and evolution at time scales orders of magnitude faster than current spatially resolved approaches. Our straightforward analysis of laser speckle patterns across the first order phase transition of VO 2 can be generalized to other systems with large scale phase separation and has potential as a powerful method with both spatial and temporal resolution to study phase separation in complex materials.

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Resolving transitions in the mesoscale domain configuration in VO 2 using laser speckle pattern analysis

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