Freestanding graphene heat engine analyzed using stochastic thermodynamics

We present an Ito-Langevin model for freestanding graphene connected to electrical circuit. The is treated as a Brownian particle in double-well potential and adjacent fixed electrode form variable capacitor. capacitor series with battery load resistor. resistor are given separate thermal reservoirs. have solved the coupled equations broad range of temperature differences between two Using ensemble averages, we report rate change energy, heat, work using stochastic thermodynamics. When held at higher temperatures, efficiency heat engine rises linearly temperature. However, when instantly then plateaus. Also, twice much entropy produced hotter compared hotter. Unexpectedly, found alter dissipated power