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Title: Thermal conductivity of the n = –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.

Authors:
ORCiD logo [1];  [2];  [1]; ORCiD logo [3]; ORCiD logo [4];  [5]; ORCiD logo [3]; ORCiD logo [6]; ORCiD logo [2]; ORCiD logo [7]
+ Show Author Affiliations
  1. Cornell Univ., Ithaca, NY (United States)
  2. Univ. of Illinois at Urbana-Champaign, IL (United States)
  3. Univ. of Florida, Gainesville, FL (United States)
  4. Univ. of Florida, Gainesville, FL (United States); Chinese Academy of Sciences (CAS), Beijing (China); ; University of Chinese Academy of Sciences, Beijing (China)
  5. Samsung Electronics (South Korea)
  6. Missouri Univ. of Science and Technology, Rolla, MO (United States)
  7. Cornell Univ., Ithaca, NY (United States); Kavli Institute at Cornell for Nanoscale Science, Ithaca, NY (United States); Leibniz Inst. for Crystal Growth (IKZ), Berlin (Germany)
Publication Date:
Research Org.:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF); US Army Research Office (ARO)
OSTI Identifier:
1850814
Alternate Identifier(s):
OSTI ID: 1769220
Grant/Contract Number:  
SC0002334; W31P4Q-08-1-0012; NNCI-2025233; DMR-1719875; OAC-1919789
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 9; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Physics

Citation Formats

Dawley, Natalie M., Pek, Ella K., Lee, Che-Hui, Ragasa, Eugene J., Xiong, Xue, Lee, Kiyoung, Phillpot, Simon R., Chernatynskiy, Aleksandr V., Cahill, David G., and Schlom, Darrell G. Thermal conductivity of the n = –5 and 10 members of the (SrTiO3)n SrO Ruddlesden–Popper superlattices. United States: N. p., 2021. Web. doi:10.1063/5.0037765.
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Dawley, Natalie M., Pek, Ella K., Lee, Che-Hui, Ragasa, Eugene J., Xiong, Xue, Lee, Kiyoung, Phillpot, Simon R., Chernatynskiy, Aleksandr V., Cahill, David G., & Schlom, Darrell G. Thermal conductivity of the n = –5 and 10 members of the (SrTiO3)n SrO Ruddlesden–Popper superlattices. United States. https://doi.org/10.1063/5.0037765
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Dawley, Natalie M., Pek, Ella K., Lee, Che-Hui, Ragasa, Eugene J., Xiong, Xue, Lee, Kiyoung, Phillpot, Simon R., Chernatynskiy, Aleksandr V., Cahill, David G., and Schlom, Darrell G. Mon . "Thermal conductivity of the n = –5 and 10 members of the (SrTiO3)n SrO Ruddlesden–Popper superlattices". United States. https://doi.org/10.1063/5.0037765. https://www.osti.gov/servlets/purl/1850814.
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@article{osti_1850814,
title = {Thermal conductivity of the n = –5 and 10 members of the (SrTiO3)n SrO Ruddlesden–Popper superlattices},
author = {Dawley, Natalie M. and Pek, Ella K. and Lee, Che-Hui and Ragasa, Eugene J. and Xiong, Xue and Lee, Kiyoung and Phillpot, Simon R. and Chernatynskiy, Aleksandr V. and Cahill, David G. and Schlom, Darrell G.},
abstractNote = {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.},
doi = {10.1063/5.0037765},
journal = {Applied Physics Letters},
number = 9,
volume = 118,
place = {United States},
year = {Mon Mar 01 00:00:00 EST 2021},
month = {Mon Mar 01 00:00:00 EST 2021}
}
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