Voltar
Artigo Acesso aberto Produção Nacional Revisado por pares
BIBTEX RIS

Phononic heat transport in nanomechanical structures: steady-state and pumping

2017; Institute of Physics; Volume: 50; Issue: 43 Linguagem: Inglês

10.1088/1751-8121/aa8c81

ISSN

1751-8121

Autores

M. I. Sena-Junior, Leandro R. F. Lima, Caio Lewenkopf,

Tópico(s)

Advanced Thermodynamics and Statistical Mechanics

Resumo

We study the heat transport due to phonons in nanomechanical structures using a phase space representation of non-equilibrium Green's functions. This representation accounts for the atomic degrees of freedom making it particularly suited for the description of small (molecular) junctions systems. We show that for the steady state limit our formalism correctly recovers the heuristic Landauer-like heat conductance for a quantum coherent molecular system coupled to thermal reservoirs. We find general expressions for the non-stationary heat current due to an external periodic drive. In both cases we discuss the quantum thermodynamic properties of the systems. We apply our formalism to the case of a diatomic molecular junction.

Referência(s)