Growth and Characterization of Hybrid Insulating Ferromagnet-Topological Insulator Heterostructure Devices
A. Kandala, A. Richardella, D. W. Rench, D. M. Zhang, T. C. Flanagan,, and N. Samarth
TL;DR
This paper reports the integration of GdN ferromagnet with Bi2Se3 topological insulator films, analyzing their structural, magnetic, and transport properties, revealing magnetic influence on surface quantum effects.
Contribution
It introduces a novel heterostructure combining insulating ferromagnet GdN with topological insulator Bi2Se3 and provides detailed characterization of their interactions.
Findings
Magnetic overlayer suppresses weak anti-localization
Heterostructures exhibit distinct magnetotransport behaviors
Structural and magnetic properties are thoroughly characterized
Abstract
We report the integration of the insulating ferromagnet GdN with epitaxial films of the topological insulator Bi2Se3 and present detailed structural, magnetic and transport characterization of the heterostructures. Fabrication of multi-channel Hall bars with bare and GdN-capped sections enables direct comparison of magnetotransport properties. We show that the presence of the magnetic overlayer results in suppression of weak anti-localization at the top surface.
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