Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session A03: Low Dimensional Topological Materials: Growth, Characterization and Imaging
8:00 AM–11:00 AM,
Monday, March 4, 2024
Room: L100C
Sponsoring
Unit:
DMP
Chair: Wenhao Liu, University of Texas at Dallas
Abstract: A03.00002 : Molecular beam epitaxy growth of SmB6 thin films*
8:36 AM–8:48 AM
Presenter:
Anjolaoluwa Bamtefa
(Harvard University)
Authors:
Anjolaoluwa Bamtefa
(Harvard University)
Jason D Hoffman
(Harvard University)
Sandesh S Kalantre
(Stanford University)
Molly P Andersen
(Stanford University)
David Goldhaber-Gordon
(Stanford University)
Jennifer E Hoffman
(Harvard University)
The majority of previous studies of SmB6 have investigated bulk crystals. However, the synthesis of epitaxial thin films presents new opportunities to tailor the surface termination, orientation, and strain, which may alter the behavior of the topologically non-trivial surface state.
In this work we use molecular beam epitaxy to grow sub-50 nm thick films of SmB6 on (001) and (111)-oriented silicon and germanium substrates. We use ex-situ x-ray diffraction to characterize the structure of the films and the impact of the substrate material and orientation. In addition, transport measurements of the films reveal a resistance plateau below around 10 K, consistent with both bulk samples and thin films reported in the literature. This work provides a platform to study the exotic ground states in strongly correlated materials.
*This work is supported by the Air Force Office of Scientific Research's (AFOSR) Multidisciplinary University Research Initiative (MURI) through Award No. FA9550-21-1-0429
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