Combined experimental-theoretical study of electron mobility-limiting mechanisms in SrSnO₃
Abstract
The discovery and development of ultra-wide bandgap (UWBG) semiconductors is crucial to accelerate the adoption of renewable power sources. This necessitates an UWBG semiconductor that exhibits robust doping with high carrier mobility over a wide range of carrier concentrations. Here we demonstrate that epitaxial thin films of the perovskite oxide Nd_xSr_(1−x)SnO₃ (SSO) do exactly this. Nd is used as a donor to successfully modulate the carrier concentration over nearly two orders of magnitude, from 3.7 × 10¹⁸ cm⁻³ to 2.0 × 10²⁰ cm⁻³. Despite being grown on lattice-mismatched substrates and thus having relatively high structural disorder, SSO films exhibited the highest room-temperature mobility, ~70 cm² V⁻¹ s⁻¹, among all known UWBG semiconductors in the range of carrier concentrations studied. The phonon-limited mobility is calculated from first principles and supplemented with a model to treat ionized impurity and Kondo scattering. This produces excellent agreement with experiment over a wide range of temperatures and carrier concentrations, and predicts the room-temperature phonon-limited mobility to be 76–99 cm² V⁻¹ s⁻¹ depending on carrier concentration. This work establishes a perovskite oxide as an emerging UWBG semiconductor candidate with potential for applications in power electronics.
Additional Information
© The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. Received 19 January 2021; Accepted 22 October 2021; Published 11 November 2021. This work was supported by the Air Force Office of Scientific Research (AFOSR) through Grant Nos. FA9550-19-1-0245 and FA9550-21-1-0025. Part of this work was supported by the National Science Foundation through DMR-1741801 and partially by the UMN MRSEC program under Award No. DMR- 2011401. Parts of this work were carried out in the Characterization Facility, University of Minnesota, which receives partial support from NSF through the MRSEC program. Work at Caltech was supported as follows: J.-J.Z. was supported by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, supported through the Office of Science of the U.S. Department of Energy under Award No. DE-SC0004993. M.B. and I.-T.L. were supported by the Air Force Office of Scientific Research through the Young Investigator Program, Grant FA9550-18-1-0280. Data availability: The data that support the findings of this study are available in the manuscript or its Supplementary Information. Other data are available from the corresponding authors (T.K.T. or B.J.) upon reasonable request. Code availability: All code that was used to generate the findings of this study are available from the references within or otherwise are available from the authors upon reasonable request. Author Contributions: T.T. and F.L. grew and structurally characterized samples. T.T. and A.K.R. performed transport measurements, the data from which were analyzed and fit by T.T., A.K.R., I.-T.L, M.B., and B.J. The first-principles calculations were performed by J.-J.Z. and I.-T.L. under the supervision of M.B. SIMS measurements were performed by T.M. and were analyzed by T.M., T.T., and B.J. All authors discussed, interpreted the results, and prepared the manuscript. B.J. coordinated all aspects of the project. The authors declare no competing interests. Peer review information: Communications Physics thanks the anonymous reviewers for their contribution to the peer review of this work.Errata
Truttmann, T.K., Zhou, JJ., Lu, IT. et al. Publisher Correction: Combined experimental-theoretical study of electron mobility-limiting mechanisms in SrSnO3. Commun Phys 5, 90 (2022). https://doi.org/10.1038/s42005-022-00868-5Attached Files
Published - s42005-021-00742-w.pdf
Supplemental Material - 42005_2021_742_MOESM1_ESM.pdf
Erratum - s42005-022-00868-5.pdf
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Additional details
- Alternative title
- Combined experimental-theoretical study of electron mobility-limiting mechanisms in SrSnO3
- Eprint ID
- 111845
- Resolver ID
- CaltechAUTHORS:20211111-210019575
- FA9550-19-1-0245
- Air Force Office of Scientific Research (AFOSR)
- FA9550-21-1-0025
- Air Force Office of Scientific Research (AFOSR)
- DMR-1741801
- NSF
- DMR- 2011401
- NSF
- Joint Center for Artificial Photosynthesis (JCAP)
- DE-SC0004993
- Department of Energy (DOE)
- FA9550-18-1-0280
- Air Force Office of Scientific Research (AFOSR)
- Created
-
2021-11-11Created from EPrint's datestamp field
- Updated
-
2022-04-07Created from EPrint's last_modified field
- Caltech groups
- JCAP