IFIBA   22255
INSTITUTO DE FISICA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Microscopic model of a phononic refrigerator
Autor/es:
ARRACHEA, L.; MUCCIOLO, E; CHAMON, C; CAPAZ, R
Revista:
PHYSICAL REVIEW B
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2012 vol. 86 p. 125424 - 125436
ISSN:
1098-0121
Resumen:
We analyze a simple microscopic model to pump heat from a cold to a hot
reservoir in a nanomechanical system. The model consists of a
one-dimensional chain of masses and springs coupled to a back gate
through which a time-dependent perturbation is applied. The action of
the gate creates a moving phononic barrier by locally pinning a mass. We
solve the problem numerically using a nonequilibrium Green's function
technique. For low driving frequencies and for sharp traveling barriers,
we show that this microscopic model realizes a phonon refrigerator.