Thermal rectification in classical and quantum systems: Searching for efficient thermal diodes

Pereira, Emmanuel

doi:10.1209/0295-5075/126/14001

Cited by 18 publications

(16 citation statements)

References 59 publications

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“…2 (a) the calculated local temperatures are undistinguishable. In the calculation based on solving the dynamics we had to integrate (3) for N trials = 1000 realizations of white noise ξ(t). The method based on the system of moments shortened the calculation time with respect to the dynamical trajectories by a factor of 1/700.…”

Section: Numerical Resultsmentioning

confidence: 99%

Asymmetric heat transport in ion crystals

et al. 2019

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We numerically demonstrate heat rectification for linear chains of ions in trap lattices with graded trapping frequencies, in contact with thermal baths implemented by optical molasses. To calculate the local temperatures and heat currents we find the stationary state by solving a system of algebraic equations. This approach is much faster than the usual method that integrates the dynamical equations of the system and averages over noise realizations. * miguelangel.simon@ehu.eus † jg.muga@ehu.es

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Section: Numerical Resultsmentioning

confidence: 99%

Asymmetric heat transport in ion crystals

et al. 2019

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“…This work adds to the recent results on rectification in spin chains without local magnetic fields [ 7 , 8 ], with disorder [ 9 ] or with external fields [ 10 , 11 , 12 , 13 , 14 , 15 ]. Importantly, to the best of our knowledge, in no previous work, strong rectification was connected to the possible emergence of NDC.…”

Section: Introductionmentioning

confidence: 68%

Giant Spin Current Rectification Due to the Interplay of Negative Differential Conductance and a Non-Uniform Magnetic Field

Lee

Balachandran

Tan

et al. 2020

Entropy

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In XXZ chains with large enough interactions, spin transport can be significantly suppressed when the bias of the dissipative driving becomes large enough. This phenomenon of negative differential conductance is caused by the formation of two oppositely polarized ferromagnetic domains at the edges of the chain. Here, we show that this many-body effect, combined with a non-uniform magnetic field, can allow for a high degree of control of the spin current. In particular, by studying all of the possible shapes of local magnetic fields potentials, we find that a configuration in which the magnetic field points up for half of the chain and down for the other half, can result in giant spin-current rectification, for example, up to 108 for a system with only 8 spins. Our results show clear indications that the rectification can increase with the system size.

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“…Erroneous thermal rectification. Harmonic junctions connected to two heat baths at different temperatures cannot rectify heat [45][46][47][48] . That is, the magnitude of the heat current should be the same when interchanging the temperatures of the reservoirs, T 1 by T N .…”

Section: B Simulationsmentioning

confidence: 99%

On the definitions and simulations of vibrational heat transport in nanojunctions

Kalantar¹,

Agarwalla²,

Segal³

2020

Preprint

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Thermal transport through nanosystems is central to numerous processes in chemistry, material sciences, electrical and mechanical engineering, with classical molecular dynamics as the key simulation tool. Here we focus on thermal junctions with a molecule bridging two solids that are maintained at different temperatures. The classical steady state heat current in this system can be simulated in different ways, either at the interfaces with the solids, which are represented by thermostats, or between atoms within the conducting molecule. We show that while the latter, intramolecular definition feasibly converges to the correct limit, the molecule-thermostat interface definition is more challenging to converge to the correct result. The problem with the interface definition is demonstrated by simulating heat transport in harmonic and anharmonic one-dimensional chains illustrating unphysical effects such as thermal rectification in harmonic junctions.

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Thermal rectification in classical and quantum systems: Searching for efficient thermal diodes

Cited by 18 publications

References 59 publications

Asymmetric heat transport in ion crystals

Asymmetric heat transport in ion crystals

Giant Spin Current Rectification Due to the Interplay of Negative Differential Conductance and a Non-Uniform Magnetic Field

On the definitions and simulations of vibrational heat transport in nanojunctions

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