Effect of Twist Angle on Interfacial Thermal Transport in Two-Dimensional Bilayers
Advances in two-dimensional (2D) devices require innovative approaches for manipulating transport properties. Analogous to the electrical and optical responses, it has been predicted that thermal transport across 2D materials can have a similar strong twist-angle dependence. Here, we report experimental evidence deviating from this understanding. In contrast to the large tunability in electrical transport, we measured an unexpected weak twist-angle dependence of interfacial thermal transport in MoS2 bilayers, which is consistent with theoretical calculations. More notably, we confirmed the existence of distinct regimes with weak and strong twist-angle dependencies for thermal transport, where, for example, a much stronger change with twist angles is expected for graphene bilayers. With atomic simulations, the distinct twist-angle effects on different 2D materials are explained by the suppression of long-wavelength phonons via the moiré superlattice. These findings elucidate the unique feature of 2D thermal transport and enable a new design space for engineering thermal devices.
NI Journal Papers
U.S. Army Research Office (ARO) MURI project[W911NF-18-1-04310432] ; U.S. Army Research Office through the Institute for Soldier Nanotechnologies at MIT[W911NF18-2-0048]
|WOS Research Area|
Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
|WOS Accession No|
|ESI Research Field|
Cited Times [WOS]:1
|Document Type||Journal Article|
|Department||Department of Mechanical and Energy Engineering|
1.Department of Mechanical Engineering,Massachusetts Institute of Technology,Cambridge,02139,United States
2.Department of Electrical Engineering and Computer Science,Massachusetts Institute of Technology,Cambridge,02139,United States
3.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
Zhang，Lenan,Zhong，Yang,Li，Xiangyu,et al. Effect of Twist Angle on Interfacial Thermal Transport in Two-Dimensional Bilayers[J]. Nano letters,2023,23(17):7790-7796.
Zhang，Lenan.,Zhong，Yang.,Li，Xiangyu.,Park，Ji Hoon.,Song，Qichen.,...&Chen，Gang.(2023).Effect of Twist Angle on Interfacial Thermal Transport in Two-Dimensional Bilayers.Nano letters,23(17),7790-7796.
Zhang，Lenan,et al."Effect of Twist Angle on Interfacial Thermal Transport in Two-Dimensional Bilayers".Nano letters 23.17(2023):7790-7796.
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