Epitaxial growth and thermal-conductivity limit of single-crystalline Bi2Se3/In2Se3 superlattices on mica
molecular beam epitaxy, Bi2Se3, In2Se3, superlattice, thermal conductivity
ABSTRACT 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.
Tsinghua University Press
Wuyang Ren,Handong Li,Lei Gao,Yong Li,Zhongyang Zhang,Chengjia Long,Haining Ji,Xiaobin Niu,Yuan Lin,Zhiming Wang, Epitaxial growth and thermal-conductivity limit of single-crystalline Bi2Se3/In2Se3 superlattices on mica. NanoRes.2017, 10(1): 247–254