Suppressed-to-enhanced thermal transport in a Fermi-Pasta-Ulam superlattice: Mediation roles of solitons and phonons
文献类型：期刊论文
| 作者 | Wang, JJ; Chen, JG |
| 刊名 | PHYSICAL REVIEW E
 |
| 出版日期 | 2020 |
| 卷号 | 101期号:4页码:- |
| 关键词 | ENERGY-TRANSPORT CONDUCTIVITY DYNAMICS SCATTERING BREATHERS MODEL |
| ISSN号 | 2470-0045 |
| DOI | 10.1103/PhysRevE.101.042207 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Managing thermal transport in nanostructured materials possesses both theoretical and application value in thermoelectric and microelectronics design. Though a suppressed thermal conductivity could be easily achieved through disorder-induced phonon scattering in a superlattice, it is challenging to enhance thermal transport in a periodically designed lattice. In this paper, we show the possibility of mediating thermal conductivity from a suppressed to an enhanced value in a Fermi-Pasta-Ulam beta superlattice with periodic cells of arithmetically increased nonlinearity. When the cell length is increased, thermal conductivity in the superlattice crosses over a suppressed region into an enhanced one and it is even higher than in a homogeneous lattice with the same nonlinearity strength. The mediation originates from the long-lived nonlinear wave packets as solitons across the disorder-induced interface between cells of the superlattice, while at the same time the normal vibrational modes as phonons are suppressed. Our result shows a promising strategy to manipulate thermal transport over a wide range in a superlattice with strong nonlinearity. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/33176]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 2.Jiangxi Sci & Technol Normal Univ, Dept Phys, Nanchang 330013, Jiangxi, Peoples R China 3.Chinese Acad Sci, Shanghai Adv Res Inst, Zhangjiang Lab, Shanghai 201210, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, JJ,Chen, JG. Suppressed-to-enhanced thermal transport in a Fermi-Pasta-Ulam superlattice: Mediation roles of solitons and phonons[J]. PHYSICAL REVIEW E,2020,101(4):-. |
| APA | Wang, JJ,&Chen, JG.(2020).Suppressed-to-enhanced thermal transport in a Fermi-Pasta-Ulam superlattice: Mediation roles of solitons and phonons.PHYSICAL REVIEW E,101(4),-. |
| MLA | Wang, JJ,et al."Suppressed-to-enhanced thermal transport in a Fermi-Pasta-Ulam superlattice: Mediation roles of solitons and phonons".PHYSICAL REVIEW E 101.4(2020):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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