Journal
PHYSICAL REVIEW LETTERS
Volume 128, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.128.126802
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Funding
- Air Force Office of Scientific Research [FA9550-20-1-0293]
- NSF graduate research fellowship
- National Science Foundation [ECCS-2026822]
- National Science Foundation through the Penn State 2D Crystal Consortium Materials Innovation Platform (2DCC-MIP) [DMR-2039351]
- NSF CAREER program [DMR-1654107]
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We have studied magnetic insulator-topological insulator heterostructures and identified a possible magnetic proximity effect in MgAl0.5Fe1.5O4/Bi2Se3 bilayers. Electrical transport and polarized neutron reflectometry confirm the existence of a magnetic proximity effect, while structural data reveal the disordered interface as the origin of the magnetic response.
Magnetic insulator-topological insulator heterostructures have been studied in search of chiral edge states via proximity induced magnetism in the topological insulator, but these states have been elusive. We identified MgAl0.5Fe1.5O4/Bi2Se3 bilayers for a possible magnetic proximity effect. Electrical transport and polarized neutron reflectometry suggest a proximity effect, but structural data indicate a disordered interface as the origin of the magnetic response. Our results provide a strategy via correlation of microstructure with magnetic data to confirm a magnetic proximity effect.
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