Quantum anomalous Hall effect for metrology

authored by: Nathaniel J. Huáng, Jessica L. Boland, Kajetan M. Fijalkowski, Charles Gould, Thorsten Hesjedal, Olga Kazakova, Susmit Kumar, Hansjörg Scherer
Abstract: The quantum anomalous Hall effect (QAHE) in magnetic topological insulators offers great potential to revolutionize quantum electrical metrology by establishing primary resistance standards operating at zero external magnetic field and realizing a universal “quantum electrical metrology toolbox” that can perform quantum resistance, voltage, and current metrology in a single instrument. To realize such promise, significant progress is still required to address materials and metrological challenges—among which, one main challenge is to make the bulk of the topological insulator sufficiently insulating to improve the robustness of resistance quantization. In this Perspective, we present an overview of the QAHE; discuss the aspects of topological material growth and characterization; and present a path toward a QAHE resistance standard realized in magnetically doped (Bi,Sb)2Te3 systems. We also present guidelines and methodologies for QAHE resistance metrology, its main limitations and challenges, as well as modern strategies to overcome them.
External Organisation(s): National Physical Laboratory (NPL)
University of Manchester
Julius Maximilian University of Würzburg
University of Oxford
Justervesenet
Physikalisch-Technische Bundesanstalt PTB
Type: Article
Journal: Applied physics letters
Volume: 126
ISSN: 0003-6951
Publication date: 27.01.2025
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Physics and Astronomy (miscellaneous)
Electronic version(s): https://doi.org/10.1063/5.0233689 (Access: Open)

BibTeX

@article{c7720b74a1804f1d8eef734a2f3df135,
title = "Quantum anomalous Hall effect for metrology",
abstract = "The quantum anomalous Hall effect (QAHE) in magnetic topological insulators offers great potential to revolutionize quantum electrical metrology by establishing primary resistance standards operating at zero external magnetic field and realizing a universal “quantum electrical metrology toolbox” that can perform quantum resistance, voltage, and current metrology in a single instrument. To realize such promise, significant progress is still required to address materials and metrological challenges—among which, one main challenge is to make the bulk of the topological insulator sufficiently insulating to improve the robustness of resistance quantization. In this Perspective, we present an overview of the QAHE; discuss the aspects of topological material growth and characterization; and present a path toward a QAHE resistance standard realized in magnetically doped (Bi,Sb)2Te3 systems. We also present guidelines and methodologies for QAHE resistance metrology, its main limitations and challenges, as well as modern strategies to overcome them.",
author = "Hu{\'a}ng, {Nathaniel J.} and Boland, {Jessica L.} and Fijalkowski, {Kajetan M.} and Charles Gould and Thorsten Hesjedal and Olga Kazakova and Susmit Kumar and Hansj{\"o}rg Scherer",
note = "Publisher Copyright: {\textcopyright} 2025 Author(s).",
year = "2025",
month = jan,
day = "27",
doi = "10.1063/5.0233689",
language = "English",
volume = "126",
journal = "Applied physics letters",
issn = "0003-6951",
publisher = "American Institute of Physics",
number = "4",
}