Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session F16: Physics Enabled by Film Growth
8:00 AM–11:00 AM,
Tuesday, March 5, 2024
Room: M100G
Sponsoring
Unit:
DCMP
Chair: Jessica Martins
Abstract: F16.00002 : Growth of Superconducting Sr2RuO4 Thin Films via Thermal Laser Epitaxy
8:12 AM–8:24 AM
Presenter:
Brendan D Faeth
(Cornell University)
Authors:
Brendan D Faeth
(Cornell University)
Varun Harbola
(Max Planck Institute for Solid State Research)
Felix V Hensling
(Max Planck Institute for Solid State Physics)
Lena N Majer
(Max Planck Institute for Solid State Physics)
Yu-Mi Wu
(Max Planck Institute for Solid State Physics)
Hans Boschker
(Max Planck Institute for Solid State Res)
Eren Suyoclu
(Max Planck Institute for Solid State Physics)
Peter A. van Aken
(Max Planck Institute for Solid State Physics)
Wolfgang Braun
(Max Planck Institute for Solid State Research)
Jochen D Mannhart
(Max Planck Institute for Solid State Research)
In order to establish the capabilities of TLE for the growth of such complex materials, we demonstrate here the successful epitaxial synthesis of several Ruddlesden-Popper phases of the Sr-Ru-O ternary oxide system via TLE. We find that the “n=1” phase Sr2RuO4 can be reliably synthesized at substrate temperatures in excess of 1200 C and in a background environment of pure molecular oxygen, within an adsorption-controlled growth window that is inaccessible to conventional MBE approaches. We show that Sr2RuO4 films grown under these conditions demonstrate extremely high structural, electronic, and chemical quality, as evidenced by the appearance of superconductivity at relatively high critical temperatures. In particular, the higher growth temperatures and elemental source fluxes afforded by laser heating allow us to achieve phase pure 214 without higher-N intergrowths typically observed in MBE-grown films. A detailed accounting of the experimental approach, growth thermodynamics and film characterization will be discussed.
This work not only demonstrates the feasibility of TLE for the synthesis of high-quality complex oxide thin films, but also suggests new routes to achieving thin film growth in other materials systems that remain as-yet inaccessible to conventional epitaxy techniques.
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