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Title: Bidirectional negative differential thermal resistance phenomenon and its physical mechanism in the Frenkel-Kontorova lattices

Abstract

Thermal conduction of the Frenkel-Kontorova (FK) lattices with interfacial coupling is investigated numerically. The results indicate that: (i) For appropriate lattice periods, as the system is symmetric, a bidirectional negative differential thermal resistance (NDTR) phenomenon will appear. If the system is asymmetric, the bidirectional NDTR is gradually converted into an unidirectional NDTR. (ii) The bidirectional NDTR phenomenon effect also depends on the period of the FK lattice as the other parameters remains unchanged. With the increment of the lattice period, the bidirectional NDTR will gradually disappear. (iii) From a stochastic dynamics point of view, thermal transport properties of the system are determined by the competition between the two types of thermal conduction: one comes from the collusion between atoms, the other is due to the elastic coupling between atoms. For the smaller lattice periods, the former type of thermal conduction occupies the dominating position and the NDTR effect will appear.

Authors:
; ; ;  [1]
  1. Faculty of Science, Kunming University of Science and Technology, Kunming 650500 (China)
Publication Date:
OSTI Identifier:
22611463
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 6; Journal Issue: 7; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ASYMMETRY; ATOMS; COMPETITION; COUPLING; STOCHASTIC PROCESSES; SYMMETRY; THERMAL CONDUCTION

Citation Formats

Jianqiang, Zhang, Linru, Nie, E-mail: lrnie@163.com, Chongyang, Chen, and Xinyu, Zhang. Bidirectional negative differential thermal resistance phenomenon and its physical mechanism in the Frenkel-Kontorova lattices. United States: N. p., 2016. Web. doi:10.1063/1.4959577.
Jianqiang, Zhang, Linru, Nie, E-mail: lrnie@163.com, Chongyang, Chen, & Xinyu, Zhang. Bidirectional negative differential thermal resistance phenomenon and its physical mechanism in the Frenkel-Kontorova lattices. United States. doi:10.1063/1.4959577.
Jianqiang, Zhang, Linru, Nie, E-mail: lrnie@163.com, Chongyang, Chen, and Xinyu, Zhang. Fri . "Bidirectional negative differential thermal resistance phenomenon and its physical mechanism in the Frenkel-Kontorova lattices". United States. doi:10.1063/1.4959577.
@article{osti_22611463,
title = {Bidirectional negative differential thermal resistance phenomenon and its physical mechanism in the Frenkel-Kontorova lattices},
author = {Jianqiang, Zhang and Linru, Nie, E-mail: lrnie@163.com and Chongyang, Chen and Xinyu, Zhang},
abstractNote = {Thermal conduction of the Frenkel-Kontorova (FK) lattices with interfacial coupling is investigated numerically. The results indicate that: (i) For appropriate lattice periods, as the system is symmetric, a bidirectional negative differential thermal resistance (NDTR) phenomenon will appear. If the system is asymmetric, the bidirectional NDTR is gradually converted into an unidirectional NDTR. (ii) The bidirectional NDTR phenomenon effect also depends on the period of the FK lattice as the other parameters remains unchanged. With the increment of the lattice period, the bidirectional NDTR will gradually disappear. (iii) From a stochastic dynamics point of view, thermal transport properties of the system are determined by the competition between the two types of thermal conduction: one comes from the collusion between atoms, the other is due to the elastic coupling between atoms. For the smaller lattice periods, the former type of thermal conduction occupies the dominating position and the NDTR effect will appear.},
doi = {10.1063/1.4959577},
journal = {AIP Advances},
number = 7,
volume = 6,
place = {United States},
year = {Fri Jul 15 00:00:00 EDT 2016},
month = {Fri Jul 15 00:00:00 EDT 2016}
}