Strain-controlled thermal conductivity in ferroic twinned films

被引：33

作者：

Li, Suzhi ^{[1
]}

Ding, Xiangdong ^{[1
]}

Ren, Jie ^{[2
,7
]}

Moya, Xavier ^{[3
]}

Li, Ju ^{[1
,4
,5
]}

Sun, Jun ^{[1
]}

Salje, Ekhard K. H. ^{[1
,6
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[2] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[3] Univ Cambridge, Dept Mat Sci, Cambridge CB3 0FS, England

[4] MIT, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA

[5] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[6] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England

[7] MIT, Dept Chem, Cambridge, MA 02139 USA

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

基金：

英国工程与自然科学研究理事会;

关键词：

DYNAMICS; GRAPHENE; BOUNDARIES;

D O I：

10.1038/srep06375

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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 k 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.

引用

页数：7

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