Symmetry breaking of the surface mediated quantum Hall effect in Bi2Se3 nanoplates using Fe3O4 substrates

Buchenau S, Sergelius P, Wiegand C, Baessler S, Zierold R, Shin HS, Ruebhausen M, Gooth J, Nielsch K (2017)

Publication Type: Journal article

Publication year: 2017

Journal

2D Materials IOP Science

Book Volume: 4

Article Number: 015044

Journal Issue: 1

DOI: 10.1088/2053-1583/aa525e

Abstract

Bi2Se3 nanoplate devices are synthesized on SiO2 and ferrimagnetic insulator substrates. We experimentally demonstrate that ferromagnetism is induced into the bottom surface. The symmetry broken bottom states give rise to an additional Shubnikov-de Haas frequency and leads to a decoupling of the top and bottom quantum Hall effects. We present a three-channel model that separates the bulk, top and bottom surface contributions to the Hall resistance, indicating the presence of two symmetry shifted half-integer QHEs.

Involved external institutions

Universität Hamburg (UHH) DE Germany (DE) Korea Research Institute of Standards and Science (KRISS) / 한국표준과학연구원 KR Korea, Republic of (KR) IBM Zurich Research Laboratory CH Switzerland (CH) Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE)

How to cite

APA:

Buchenau, S., Sergelius, P., Wiegand, C., Baessler, S., Zierold, R., Shin, H.S.,... Nielsch, K. (2017). Symmetry breaking of the surface mediated quantum Hall effect in Bi2Se3 nanoplates using Fe3O4 substrates. 2D Materials, 4(1). https://doi.org/10.1088/2053-1583/aa525e

MLA:

Buchenau, Soeren, et al. "Symmetry breaking of the surface mediated quantum Hall effect in Bi2Se3 nanoplates using Fe3O4 substrates." 2D Materials 4.1 (2017).

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