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Title: Kinetic Spinodal Instabilities in the Mott Transition in V2O3: Evidence from Hysteresis Scaling and Dissipative Phase Ordering
Authors: Bar, Tapas
Choudhary, Sujeet Kumar
Ashraf, Md. Arsalan
Issue Date: 24-Jul-2018
Publisher: American Physical Society
Citation: Physical Review Letters 2018, Vol.121, p 045701
Abstract: We present the first systematic observation of scaling of thermal hysteresis with the temperature scanning rate around an abrupt thermodynamic transition in correlated electron systems. We show that the depth of supercooling and superheating in vanadium sesquioxide (V2O3) shifts with the temperature quench rates. The dynamic scaling exponent is close to the mean field prediction of 2/3. These observations, combined with the purely dissipative continuous ordering seen in “quench-and-hold” experiments, indicate departures from classical nucleation theory toward a barrier-free phase ordering associated with critical dynamics. Observation of critical-like features and scaling in a thermally induced abrupt phase transition suggests that the presence of a spinodal-like instability is not just an artifact of the mean field theories but can also exist in the transformation kinetics of real systems, surviving fluctuations.
Description: Open Access
ISSN: 0031-9007 (print)
1079-7114 (online)
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Copyright: © 2018 American Physical Society
Appears in Collections:Research Papers (TP)

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