Please use this identifier to cite or link to this item:
|Title:||Tunable heat pump by modulating the coupling to the leads||Authors:||Cuansing, E.C.
|Issue Date:||16-Aug-2010||Citation:||Cuansing, E.C., Wang, J.-S. (2010-08-16). Tunable heat pump by modulating the coupling to the leads. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 82 (2) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevE.82.021116||Abstract:||We follow the nonequilibrium Green's function formalism to study time-dependent thermal transport in a linear chain system consisting of two semi-infinite leads connected together by a coupling that is harmonically modulated in time. The modulation is driven by an external agent that can absorb and emit energy. We determine the energy current flowing out of the leads exactly by solving numerically the Dyson equation for the contour-ordered Green's function. The amplitude of the modulated coupling is of the same order as the interparticle coupling within each lead. When the leads have the same temperature, our numerical results show that modulating the coupling between the leads may direct energy to either flow into the leads simultaneously or flow out of the leads simultaneously, depending on the values of the driving frequency and temperature. A special combination of values of the driving frequency and temperature exists wherein no net energy flows into or out of the leads, even for long times. When one of the leads is warmer than the other, net energy flows out of the warmer lead. For the cooler lead, however, the direction of the energy current flow depends on the values of the driving frequency and temperature. In addition, we find transient effects to become more pronounced for higher values of the driving frequency. © 2010 The American Physical Society.||Source Title:||Physical Review E - Statistical, Nonlinear, and Soft Matter Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/98459||ISSN:||15393755||DOI:||10.1103/PhysRevE.82.021116|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 25, 2021
WEB OF SCIENCETM
checked on Feb 25, 2021
checked on Feb 28, 2021
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.