Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session G72: Topological Multilayers
11:30 AM–2:30 PM,
Tuesday, March 15, 2022
Room: Hyatt Regency Hotel -Jackson Park D
Sponsoring
Units:
DMP GMAG DCMP
Chair: Xuanyuan Jian, University of Florida; Purnima Balakrishnan, National Institute of Standards and Tech
Abstract: G72.00003 : Spacer-Layer-Tunable Magnetism and High-Field Topological Hall Effect in Topological Insulator Heterostructures*
12:18 PM–12:30 PM
Withdrawn
Presenter:
Xiong Yao
(Rutgers University)
Authors:
Xiong Yao
(Rutgers University)
Hee Taek Yi
(Rutgers, The State University of New Jersey)
Deepti Jain
(Rutgers University, New Brunswick)
Myung-Geun Han
(Brookhaven National Laboratory)
Seongshik Oh
(Rutgers University, New Brunswick)
properties in topological heterostructures over a wide range, from a ferromagnetic phase with a Curie temperature of around 100 K all the way to a paramagnetic phase, while keeping the overall chemical composition the same, by controlling the thickness of nonmagnetic spacer layers between two atomically thin magnetic layers. This work showcases that spacer-layer control is a powerful tool to manipulate magneto-topological functionalities in MTI heterostructures. Furthermore, the interaction between the MTI and the Cr2O3 buffer layers also leads to a robust topological Hall effect surviving up to a record-high 6 T of magnetic field, shedding light on the critical role of interfacial layers in thin-film topological materials.
*This work was supported by the center for Quantum Materials Synthesis (cQMS), funded by the Gordon and Betty Moore Foundation’s EPiQS initiative through grant GBMF6402, and by Rutgers University. It was additionally supported by MURI W911NF2020166 and Army Research Office (ARO) Grant No. W911NF-20-1-0108. The work at Brookhaven National Laboratory is supported by the Materials Science and Engineering Divisions, Office of Basic Energy Sciences of the U.S. Department of Energy under contract no. DESC0012704. FIB use at the Center for Functional Nanomaterials, Brookhaven National Laboratory, is acknowledged.Â
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