Heat transport and cooling performance in a nanomechanical system with local and non local interactions

M.F. CARUSELA; A. SOBA; N. BERAHA

Otro; Journal of Physics A: Mathematical and Theoretical; 2021

We study the heat transport through a one dimensional nanomechanical time-dependent system. The microscopic model consist of coupled chains of atoms with local and non-local interactions between particles. We show that the system presents dierent stationary transport regimes depending on the characteristic parameters as the driving frequency, temperature gradients and the degree of locality of the interactions. In one of the regimes, the system operates as a phonon refrigerator whose cooling performance is analyzed. Based on a low frequency approach, we show that non-locality and its interplay with dissipation worsen the cooling capacity. The problem is solved numerically using the Keldysh non-equilibrium Green's function formalism.(ARTÍCULO ENVIADO PARA SU PUBLICACIÓN. ACTUAMNETE NOS ENCONTRAMOS A LA ESPERA DE LA RESPUESTA POR PARTE DE LOS JURADOS)