Effective approach for anharmonic chains of oscillators: Analytical description of negative differential thermal resistance

Mendonça, Mateus S.; Pereira, Emmanuel

doi:10.1016/j.physleta.2015.06.015

Cited by 13 publications

(6 citation statements)

References 45 publications

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“…The detailed structure of M for the Hamiltonian (35) is shown in appendix B. Having M at hand, the multipartite system obeys the steady-state equations (27), (33), and (34), where the only non-zero elements in…”

Section: Generalization To Chains Of Oscillatorsmentioning

confidence: 99%

“…Rectification can be used in thermal diodes or heat valves which have been proposed in classical [13][14][15][16][17][18][19][20][21] as well as in quantum systems [10,11,[22][23][24][25][26]. As an alternative to nonlinearities, a coupling of the system to self-consistent reservoirs which guide the constituents of a chain to local equilibrium have been studied [27][28][29][30][31][32][33][34]. Experimentally, thermal rectification has been realized in solid state systems following the ideas of Peyrard [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

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Rectification of heat currents across nonlinear quantum chains: a versatile approach beyond weak thermal contact

et al. 2018

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Within the emerging field of quantum thermodynamics the issues of heat transfer and heat rectification are basic ingredients for the understanding and design of heat engines or refrigerators at nanoscales. Here, a consistent and versatile approach for mesoscopic devices operating with continuous degrees of freedom is developed valid from low up to strong system-reservoir couplings and over the whole temperature range. It allows to cover weak to moderate nonlinearities and is applicable to various scenarios including the presence of disorder and external time-dependent fields. As a particular application coherent one-dimensional chains of anharmonic oscillators terminated by thermal reservoirs are analyzed with particular focus on rectification. The efficiency of the method opens a door to treat also rather long chains and extensions to higher dimensions and geometries.

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Section: Generalization To Chains Of Oscillatorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rectification of heat currents across nonlinear quantum chains: a versatile approach beyond weak thermal contact

et al. 2018

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“…Negative differential thermal resistance (NDTR) refers to the counterintuitive phenomenon that the heat flux decreases with increasing temperature bias. In the past decade, NDTR has attracted much attention, as a thermal analogue to negative differential electrical resistance. − The phenomenon of NDTR has been reported in several systems, including one-dimensional nonlinear lattices, − low-dimensional nanomaterials, − and metal-dielectric interfaces . It is expected that NDTR effects may lead to an impressive technological innovation and even the construction of thermal devices, which can be found in many areas, including thermal management − and energy-saving applications. − …”

Section: Introductionmentioning

confidence: 99%

Enhanced Effect of Negative Differential Thermal Resistance in Nanoscale Confined Structure with Nanopatterned Surfaces

Wang

2019

J. Phys. Chem. C

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A nanoscale confined fluid structure with nanopatterned surface has been investigated by using nonequilibrium molecular dynamics simulations and kinetic theory. The negative differential thermal resistance (NDTR) effect has been observed in such a nanoscale solid–fluid–solid sandwiched structure, but for high fluid density, the NDTR effect is weak or even disappears. In the present paper, it is shown that the NDTR effect can be enhanced or reproduced in the range of ΔT > 150 K roughly by introducing a nanopatterned structure to the cold surface owing to the enhanced molecule adsorption in the nanocavities. The findings in the present paper pave the way for the application of NDTR in the design of a thermal device.

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“…The ability to thermal control may have interesting applications such as heat waste recovery, energy storage, and phononics. In the phononics (understanding and controlling the thermal low), it is desirable to develop the thermal circuit ingredients, such as thermal diodes [3][4][5], thermal transistors [6,7], thermal memory [8] and thermal logic gate [9], analogous to electrical circuit components. The irst report of heat manipulation was represented in 2002 [3].…”

Section: Introductionmentioning

confidence: 99%

Bio-moleculear thermal oscillator and constant heat current source

Panahinia¹,

Behnia²

2019

Int J Phys Res Appl

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The demand for materials and devices that are capable of controlling heat fl ux has attracted many interests due to desire to attain new sources of energy and on-chip cooling. Excellent properties of DNA make it as an interesting nanomaterial in future technologies. In this paper, we aim to investigate the thermal fl ow through two sequence combinations of DNA, e.g, (AT) 4 (CG) 4 (AT) 4 (CG) 4 and (CG) 8 (AT) 8 . Two interesting phenomena have been observed respectively. In the fi rst confi guration, an oscillatory thermal fl ux is observed. In this way, an oscillating heat fl ux from a stationary spatial thermal gradient is provided by varying the gate temperature. In the second confi guration, the system behaves as a constant heat current source. The physical mechanism behind each phenomenon is identifi ed. In the fi rst case, it was shown that the transition between thermal positive conductance and negative diff erential conductance implies oscillatory heat current. In the latter, the discordance between the phonon bands of the two coupled sequences results in constant thermal fl ow despite of increasing in temperature gradient.

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Effective approach for anharmonic chains of oscillators: Analytical description of negative differential thermal resistance

Cited by 13 publications

References 45 publications

Rectification of heat currents across nonlinear quantum chains: a versatile approach beyond weak thermal contact

Rectification of heat currents across nonlinear quantum chains: a versatile approach beyond weak thermal contact

Enhanced Effect of Negative Differential Thermal Resistance in Nanoscale Confined Structure with Nanopatterned Surfaces

Bio-moleculear thermal oscillator and constant heat current source

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