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We observed that close to a Mott transition, over a small temperature range,the predominance of slow relaxations leads to decoupling of electrons from thethermal bath. This has been established by observation of large deviation ofthe thermal noise in the films of Mott system $NdNiO_{3}$ from the canonicalJohnson-Nyquist value of $4k_{B}TR$ close to the transition. It is suggestedthat such a large noise arise from small isolated pockets of nanometricmetallic phases (estimated size $\sim$ 15-20 nm) within the insulating phasewith the charging energy as the control parameter.

Observation of decoupling of electrons from phonon bath close to a correlation driven metal-insulator transition