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Title: Engineering SrSnO3 Phases and Electron Mobility at Room Temperature Using Epitaxial Strain

Journal Article · · ACS Applied Materials and Interfaces

High-speed electronics require epitaxial films with exceptionally high carrier mobility at room temperature (RT). Alkaline-earth stannates with high RT mobility show outstanding prospects for oxide electronics operating at ambient temperatures. However, despite significant progress over the last few years, mobility in stannate films has been limited by dislocations because of the inability to grow fully coherent films. Here, we demonstrate the growth of coherent, strain-engineered phases of epitaxial SrSnO3 (SSO) films using a radical-based molecular beam epitaxy approach. Compressive strain stabilized the high-symmetry tetragonal phase of SSO at RT, which, in bulk, exists only at temperatures between 1062 and 1295 K. We achieved a mobility enhancement of over 300% in doped films compared with the low-temperature orthorhombic polymorph. Using comprehensive temperature-dependent synchrotron-based X-ray measurements, electronic transport, and first principles calculations, crystal and electronic structures of SSO films were investigated as a function of strain. Furthermore, we argue that strain-engineered films of stannate will enable high mobility oxide electronics operating at RT with the added advantage of being optically transparent.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); Air Force Research Laboratory (AFRL), Air Force Office of Scientific Research (AFOSR); USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1490092
Journal Information:
ACS Applied Materials and Interfaces, Vol. 10, Issue 50; ISSN 1944-8244
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (7)

Unraveling the effect of electron-electron interaction on electronic transport in La-doped SrSnO 3 films journal August 2019
Conductive Oxide Interfaces for Field Effect Devices journal June 2019
Designing novel perovskite-type strontium stannate (SrSnO 3 ) and its potential as an electrode material for the enhanced sensing of anti-inflammatory drug mesalamine in biological samples journal January 2019
Dopant Solubility, and Charge Compensation in La-doped SrSnO3 Films text January 2019
Strain Tuning of Plasma Frequency in Vanadate, Niobate, and Molybdate Perovskite Oxides text January 2019
Wide Bandgap Perovskite Oxides with High Room‐Temperature Electron Mobility journal June 2019
Dopant solubility and charge compensation in La-doped SrSnO 3 films journal October 2019