Understanding Signatures of Emergent Magnetism in Topological Insulator/Ferrite Bilayers

Lauren J. Riddiford, Alexander J. Grutter, Timothy Pillsbury, Max Stanley, Danielle Reifsnyder Hickey, Peng Li, Nasim Alem, Nitin Samarth, Yuri Suzuki

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number126802
JournalPhysical review letters
Volume128
Issue number12
DOIs
StatePublished - Mar 25 2022

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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