Epitaxial growth and thermal-conductivity limit of singlecrystalline Bi2Se3/In2Se3 superlattices on mica  

作　　者：Wuyang Ren Handong Li Lei Gao Yong Li Zhongyang Zhang Chengjia Long Haining Ji Xiaobin Niu Yuan Lin Zhiming Wang 

机构地区：[1]Institute ofFundamen tal and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China [2]State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China

出　　处：《Nano Research》2017年第1期247-254,共8页纳米研究（英文版）

基　　金：Acknowledgements This work is supported by the National Natural Science Foundation of China （Nos. 11104010, 61474014, and 51272038）, Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics （No. 20120910）, and the National Basic Research Program of China （No. 2013CB933301）.

摘　　要：Thermal transport in superlattices is governed by various phonon-scattering processes. For extracting the phonon-scattering contribution of hetero-interfaces in chalcogenide superlattices, single-crystalline Bi2Se3/In2Se3 （BS/IS） superlattices with minimized defects are prepared on fluorophlogopite mica by molecular beam epitaxy. The cross-plane heat-conducting properties of the BS/IS superlattices are demonstrated to depend precisely on the period thicknesses and constituents of the superlattices, where a minimum in the thermal conductivity indicates a crossover from particle-like to wave-like phonon transport in the superlattices. The thermal-conductivity minimum of the BS/IS superlattices is nearly one order of magnitude lower than that of intrinsic BS film.Thermal transport in superlattices is governed by various phonon-scattering processes. For extracting the phonon-scattering contribution of hetero-interfaces in chalcogenide superlattices, single-crystalline Bi2Se3/In2Se3 （BS/IS） superlattices with minimized defects are prepared on fluorophlogopite mica by molecular beam epitaxy. The cross-plane heat-conducting properties of the BS/IS superlattices are demonstrated to depend precisely on the period thicknesses and constituents of the superlattices, where a minimum in the thermal conductivity indicates a crossover from particle-like to wave-like phonon transport in the superlattices. The thermal-conductivity minimum of the BS/IS superlattices is nearly one order of magnitude lower than that of intrinsic BS film.

关 键 词：molecular beam epitaxy Bi2Se3 In2Se3 SUPERLATTICE thermal conductivity 

分 类 号：O[理学]