Impedance spectroscopy study of mixed Bi2Se3 topological insulator-magnetic insulator nanoparticles

Dong Min Choi, Kyu Won Lee, Yeo Jin Lee, Cheol Eui Lee

Research output: Contribution to journalArticlepeer-review


Our impedance spectroscopy measurements have revealed an increase in the surface state resistance of the topological insulator Bi2Se3 nanoparticles mixed with magnetic insulator BaFe12O19 nanoparticles. The unusual change in the transport properties of the topological insulator may be explained by an opening of the energy band gap, arising from exchange coupling to the proximate magnetic insulator nanoparticles.

Original languageEnglish
Article number114293
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Publication statusPublished - 2020 Oct


  • Impedance spectroscopy
  • Magnetic insulator nanoparticles
  • Magnetic proximity effect
  • Topological insulator BiSe nanoparticles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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