Strain-controlled thermal conductivity in ferroic twinned films.

Li, S and Ding, X and Ren, J and Moya, X and Li, J and Sun, J and Salje, E. K. H. (2014) Strain-controlled thermal conductivity in ferroic twinned films. Scientific Reports, 4. p. 6375. ISSN 2045-2322, ESSN: 2045-2322 DOI 10.1038/srep06375

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Official URL: http://www.nature.com/srep/2014/140916/srep06375/f...

Abstract

Large reversible changes of thermal conductivity are induced by mechanical stress, and the corresponding device is a key element for phononics applications. We show that the thermal conductivity κ of ferroic twinned thin films can be reversibly controlled by strain. Nonequilibrium molecular dynamics simulations reveal that thermal conductivity decreases linearly with the number of twin boundaries perpendicular to the direction of heat flow. Our demonstration of large and reversible changes in thermal conductivity driven by strain may inspire the design of controllable thermal switches for thermal logic gates and all-solid-state cooling devices.

Item Type: Article
Uncontrolled Keywords: 2014AREP; IA68;
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
08 - Green Open Access
Journal or Publication Title: Scientific Reports
Volume: 4
Page Range: p. 6375
Identification Number: 10.1038/srep06375
Depositing User: Sarah Humbert
Date Deposited: 21 Nov 2014 19:32
Last Modified: 18 Dec 2014 17:44
URI: http://eprints.esc.cam.ac.uk/id/eprint/3155

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