DataVXAdvanced MaterialsPaper
journal article·2020-08

Realization of Epitaxial Thin Films of the Topological Crystalline Insulator Sr3SnO

Yanjun Ma, Anthony Edgeton, Hanjong Paik, Brendan D. Faeth, Christopher T. Parzyck, Betül Pamuk, Shun‐Li Shang, Zi‐Kui Liu, Kyle M. Shen, Darrell G. Schlom, Chang‐Beom Eom

Advanced Materials· Volume 32· Issue 34
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Source abstract

Abstract

Abstract Topological materials are derived from the interplay between symmetry and topology. Advances in topological band theories have led to the prediction that the antiperovskite oxide Sr3SnO is a topological crystalline insulator, a new electronic phase of matter where the conductivity in its (001) crystallographic planes is protected by crystallographic point group symmetries. Realization of this material, however, is challenging. Guided by thermodynamic calculations, a deposition approach is designed and implemented to achieve the adsorption‐controlled growth of epitaxial Sr3SnO single‐crystal films by molecular‐beam epitaxy (MBE). In situ transport and angle‐resolved photoemission spectroscopy measurements reveal the metallic and electronic structure of the as‐grown samples. Compared with conventional MBE, the used synthesis route results in superior sample quality and is readily adapted to other topological systems with antiperovskite structures. The successful realization of thin films of Sr3SnO opens opportunities to manipulate topological states by tuning symmetries via strain engineering and heterostructuring.
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Research context

Materials processing

OpenAlex topics: Topological Materials and Phenomena · Advanced Condensed Matter Physics · Electronic and Structural Properties of Oxides

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics and Astronomy West Virginia University Morgantown WV 26506 USA

Department of Material Science and Engineering University of Wisconsin‐Madison Madison WI 53706 USA

Platform for the Accelerated Realization, Analysis, and Discovery of Interface Materials (PARADIM) Cornell University Ithaca NY 14853 USA

Laboratory of Atomic and Solid State Physics Cornell University Ithaca NY 14853 USA

Department of Materials Science and Engineering The Pennsylvania State University University Park Pennsylvania PA 16802 USA

Kavli Institute at Cornell for Nanoscale Science Ithaca NY 14853 USA

Department of Material Science and Engineering Cornell University Ithaca NY 14853 USA

Leibniz‐Institut für Kristallzüchtung Max‐Born‐Str. 2 Berlin 12489 Germany

Funding

National Science Foundation · Air Force Office of Scientific Research · Cornell Center for Materials Research

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