Evidence of kinetically arrested supercooled phases in the pervoskite oxide NdNiO$ 3$ - Condensed Matter > Other Condensed MatterReportar como inadecuado




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Abstract: We report the time and temperature dependent response of thermopower in thenon-magnetic perovskite oxide NdNiO$ 3$. We find that on cooling below themetal-insulator transition temperature the system evolves into a phaseseparated state which consists of supercooled metallic and insulating phases.This phase separated state exhibits out of equilibrium features such as coolingrate dependence and time dependence. The existence of these dynamical featuresis attributed to the transformation of supercooled metallic phases to theinsulating state. On cooling a small fraction of supercooled phases getskinetically arrested in a glassy state and these supercooled phases remain inthat state down to low temperature. In the heating cycle the arrested statesdearrest above 150 K and this results in the reappearance of time dependentfeatures.



Autor: Devendra Kumar, K. P. Rajeev, J. A. Alonso, M. J. Martinez Lope

Fuente: https://arxiv.org/







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