Bulletin of the American Physical Society
2024 APS March Meeting
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session F07: Correlated Topological Metals and Other Quantum Fluids
8:00 AM–10:36 AM,
Tuesday, March 5, 2024
Room: L100H
Sponsoring
Unit:
DCMP
Chair: Frank Kruger, University College London; Dmitry Chichinadze, National High Magnetic Field Laboratory
Abstract: F07.00009 : Low temperature magneto-transport of epitaxial samarium hexaboride films*
9:36 AM–9:48 AM
Presenter:
Sandesh S Kalantre
(Stanford University)
Authors:
Sandesh S Kalantre
(Stanford University)
Anjolaoluwa Bamtefa
(Harvard University)
Jason D Hoffman
(Harvard)
Jennifer E Hoffman
(Harvard University)
David Goldhaber-Gordon
(Stanford University)
In this work, we work with SmB6 films epitaxially grown on Si by molecular-beam epitaxy and perform magneto-transport with film thickness from 10 to 80 nm. Measurements are performed on unpatterned films via the van der Pauw method and through micro-fabricated Hall bars etched via Ar ion-milling. Hall measurements at 1.5 K suggest a sheet carrier density on the order of 1E16 cm-2, with parallel conduction, presumably from bulk carriers, freezing out below 10 K. A critical analysis of sheet resistance as a function of film thickness indicates some challenges with growth on Si and points towards strategies that can lead to further optimization of such films.
*We acknowledge funding from AFOSR MURI grant no. FA9550-21-1-0429.
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