@article{4c4bf43c4e544ae2839546b252615746,
title = "Thermal conductivity of the n = 1-5 and 10 members of the (SrTiO3)n SrO Ruddlesden-Popper superlattices",
abstract = "Unlike many superlattice structures, Ruddlesden-Popper phases have atomically abrupt interfaces useful for interrogating how periodic atomic layers affect thermal properties. Here, we measure the thermal conductivity in thin films of the n = 1-5 and 10 members of the (SrTiO3)nSrO Ruddlesden-Popper superlattices grown by molecular-beam epitaxy and compare the results to a single crystal of the n = 1 Ruddlesden-Popper SrLaAlO4. The thermal conductivity cross-plane to the superlattice layering (k33) is measured using time-domain thermoreflectance as a function of temperature and the results are compared to first-principles calculations. The thermal conductivity of this homologous series decreases with increasing interface density. Characterization by x-ray diffraction and scanning transmission electron microscopy confirms that these samples have a Ruddlesden-Popper superlattice structure. ",
author = "Dawley, {Natalie M.} and Pek, {Ella K.} and Lee, {Che Hui} and Ragasa, {Eugene J.} and Xue Xiong and Kiyoung Lee and Phillpot, {Simon R.} and Chernatynskiy, {Aleksandr V.} and Cahill, {David G.} and Schlom, {Darrell G.}",
note = "Funding Information: The synthesis and characterization work at Cornell was supported by the U.S. Department of Energy, Office of Basic Sciences, Division of Materials Sciences and Engineering, under Award No. DE-SC0002334. This work was sponsored by the Defense Advanced Research Projects Agency (DARPA) and the U.S. Army Aviation and Missile Research, Development, and Engineering Center (AMRDEC) under Contract No. W31P4Q-08-1-0012.47 Support of the UCLA Center for Functional Engineered and Nano Architectonics is acknowledged. Sample preparation was in part facilitated by the Cornell NanoScale Facility, a member of the National Nanotechnology Coordinated Infrastructure (NNCI), which is supported by the National Science Foundation (Grant No. NNCI-2025233). This work made use of the Cornell Center for Materials Research Shared Facilities, which are supported through the NSF MRSEC program (No. DMR-1719875). This study was carried out in part in the Materials Research Laboratory Central Research Facilities, University of Illinois. This work was supported in part by the High Performance Computing Center at Missouri University of Science and Technology and by the National Science Foundation under Grant No. OAC-1919789. Publisher Copyright: {\textcopyright} 2021 Author(s).",
year = "2021",
month = mar,
day = "1",
doi = "10.1063/5.0037765",
language = "English (US)",
volume = "118",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "9",
}