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arXiv · 2301.08254

Critical Slowing Down at the Abrupt Mott Transition: When the First-Order Phase Transition Becomes Zeroth-Order and Looks Like Second-Order

Satyaki Kundu·Tapas Bar·Rajesh Kumble Nayak·Bhavtosh Bansal
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Abstract

We report that the thermally-induced Mott transition in vanadium sesquioxide shows critical-slowing-down and enhanced variance ('critical opalescence') of the order parameter fluctuations measured through low-frequency resistance-noise spectroscopy. Coupled with the observed increase of also the phase-ordering time, these features suggest that the strong abrupt transition is controlled by a critical-like singularity in the hysteretic metastable phase. The singularity is identified with the spinodal point and is a likely consequence of the strain-induced long-range interaction.

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Satyaki Kundu, Tapas Bar, Rajesh Kumble Nayak, Bhavtosh Bansal. 2023-01-19. Critical Slowing Down at the Abrupt Mott Transition: When the First-Order Phase Transition Becomes Zeroth-Order and Looks Like Second-Order. https://doi.org/10.1103/physrevlett.124.095703

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