Abstract The recent realizations of the quantum anomalous Hall effect (QAHE) in MnBi2Te4 and MnBi4Te7 benchmark the (MnBi2Te4)(Bi2Te3)n family as a promising hotbed for further QAHE improvements. The family owes its potential to its ferromagnetically (FM) ordered MnBi2Te4 septuple layers (SLs). However, the QAHE realization is complicated in MnBi2Te4 and MnBi4Te7 due to the substantial antiferromagnetic (AFM) coupling between the SLs. An FM state, advantageous for the QAHE, can be stabilized by interlacing the SLs with an increasing number n of Bi2Te3 quintuple layers (QLs). However, the mechanisms driving the FM state and the number of necessary QLs are not understood, and the surface magnetism remains obscure. Here, robust FM properties in MnBi6Te10 (n = 2) with Tc ≈ 12 K are demonstrated and their origin is established in the Mn/Bi intermixing phenomenon by a combined experimental and theoretical study. The measurements reveal a magnetically intact surface with a large magnetic moment, and with FM properties similar to the bulk. This investigation thus consolidates the MnBi6Te10 system as perspective for the QAHE at elevated temperatures.
Beschreibung
Intermixing-Driven Surface and Bulk Ferromagnetism in the Quantum Anomalous Hall Candidate MnBi6Te10
%0 Journal Article
%1 noauthororeditor
%A Tcakaev, Abdul-Vakhab
%A Rubrecht, Bastian
%A Facio, Jorge I.
%A Zabolotnyy, Volodymyr B.
%A Corredor, Laura T.
%A Folkers, Laura C.
%A Kochetkova, Ekaterina
%A Peixoto, Thiago R. F.
%A Kagerer, Philipp
%A Heinze, Simon
%A Bentmann, Hendrik
%A Green, Robert J.
%A Gargiani, Pierluigi
%A Valvidares, Manuel
%A Weschke, Eugen
%A Haverkort, Maurits W.
%A Reinert, Friedrich
%A van den Brink, Jeroen
%A Büchner, Bernd
%A Wolter, Anja U. B.
%A Isaeva, Anna
%A Hinkov, Vladimir
%D 2023
%J Adv. Sci.
%K a b
%N 2203239
%P 2203239
%R 10.1002/advs.202203239
%T Intermixing-driven surface and bulk ferromagnetism in the quantum anomalous Hall candidate MnBi$_6$Te$_10$
%U https://onlinelibrary.wiley.com/doi/abs/10.1002/advs.202203239
%V 10
%X Abstract The recent realizations of the quantum anomalous Hall effect (QAHE) in MnBi2Te4 and MnBi4Te7 benchmark the (MnBi2Te4)(Bi2Te3)n family as a promising hotbed for further QAHE improvements. The family owes its potential to its ferromagnetically (FM) ordered MnBi2Te4 septuple layers (SLs). However, the QAHE realization is complicated in MnBi2Te4 and MnBi4Te7 due to the substantial antiferromagnetic (AFM) coupling between the SLs. An FM state, advantageous for the QAHE, can be stabilized by interlacing the SLs with an increasing number n of Bi2Te3 quintuple layers (QLs). However, the mechanisms driving the FM state and the number of necessary QLs are not understood, and the surface magnetism remains obscure. Here, robust FM properties in MnBi6Te10 (n = 2) with Tc ≈ 12 K are demonstrated and their origin is established in the Mn/Bi intermixing phenomenon by a combined experimental and theoretical study. The measurements reveal a magnetically intact surface with a large magnetic moment, and with FM properties similar to the bulk. This investigation thus consolidates the MnBi6Te10 system as perspective for the QAHE at elevated temperatures.
@article{noauthororeditor,
abstract = {Abstract The recent realizations of the quantum anomalous Hall effect (QAHE) in MnBi2Te4 and MnBi4Te7 benchmark the (MnBi2Te4)(Bi2Te3)n family as a promising hotbed for further QAHE improvements. The family owes its potential to its ferromagnetically (FM) ordered MnBi2Te4 septuple layers (SLs). However, the QAHE realization is complicated in MnBi2Te4 and MnBi4Te7 due to the substantial antiferromagnetic (AFM) coupling between the SLs. An FM state, advantageous for the QAHE, can be stabilized by interlacing the SLs with an increasing number n of Bi2Te3 quintuple layers (QLs). However, the mechanisms driving the FM state and the number of necessary QLs are not understood, and the surface magnetism remains obscure. Here, robust FM properties in MnBi6Te10 (n = 2) with Tc ≈ 12 K are demonstrated and their origin is established in the Mn/Bi intermixing phenomenon by a combined experimental and theoretical study. The measurements reveal a magnetically intact surface with a large magnetic moment, and with FM properties similar to the bulk. This investigation thus consolidates the MnBi6Te10 system as perspective for the QAHE at elevated temperatures.},
added-at = {2023-03-01T14:52:52.000+0100},
author = {Tcakaev, Abdul-Vakhab and Rubrecht, Bastian and Facio, Jorge I. and Zabolotnyy, Volodymyr B. and Corredor, Laura T. and Folkers, Laura C. and Kochetkova, Ekaterina and Peixoto, Thiago R. F. and Kagerer, Philipp and Heinze, Simon and Bentmann, Hendrik and Green, Robert J. and Gargiani, Pierluigi and Valvidares, Manuel and Weschke, Eugen and Haverkort, Maurits W. and Reinert, Friedrich and van den Brink, Jeroen and Büchner, Bernd and Wolter, Anja U. B. and Isaeva, Anna and Hinkov, Vladimir},
biburl = {https://www.bibsonomy.org/bibtex/27f82dfb89d5318dc9a2f9f2d022c9277/ctqmat},
day = 17,
description = {Intermixing-Driven Surface and Bulk Ferromagnetism in the Quantum Anomalous Hall Candidate MnBi6Te10},
doi = {10.1002/advs.202203239},
interhash = {8b95da7af663ea26d9eab618db43a1c5},
intrahash = {7f82dfb89d5318dc9a2f9f2d022c9277},
journal = {Adv. Sci.},
keywords = {a b},
month = {2},
note = {undefined},
number = 2203239,
pages = 2203239,
timestamp = {2023-10-18T12:32:30.000+0200},
title = {Intermixing-driven surface and bulk ferromagnetism in the quantum anomalous Hall candidate MnBi$_{\mathbf{6}}$Te$_{\mathbf{10}}$},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/advs.202203239},
volume = 10,
year = 2023
}