TY - JOUR
T1 - Natural van der Waals heterostructural single crystals with both magnetic and topological properties
AU - Wu, Jiazhen
AU - Liu, Fucai
AU - Sasase, Masato
AU - Ienaga, Koichiro
AU - Obata, Yukiko
AU - Yukawa, Ryu
AU - Horiba, Koji
AU - Kumigashira, Hiroshi
AU - Okuma, Satoshi
AU - Inoshita, Takeshi
AU - Hosono, Hideo
N1 - Funding Information:
This work was supported by the Japan Society for the Promotion of Science (JSPS) through a Grant-in-Aid for Scientific Research (S), no. 17H06153, and by the MEXT Element Strategy Initiative to form a research core, and also by JSPS Core-to-Core Program.
Publisher Copyright:
© 2019 The Authors.
PY - 2019/11/15
Y1 - 2019/11/15
N2 - Heterostructures having both magnetism and topology are promising materials for the realization of exotic topological quantum states while challenging in synthesis and engineering. Here, we report natural magnetic van der Waals heterostructures of (MnBi2Te4)m(Bi2Te3)n that exhibit controllable magnetic properties while maintaining their topological surface states. The interlayer antiferromagnetic exchange coupling is gradually weakened as the separation of magnetic layers increases, and an anomalous Hall effect that is well coupled with magnetization and shows ferromagnetic hysteresis was observed below 5 K. The obtained homogeneous heterostructure with atomically sharp interface and intrinsic magnetic properties will be an ideal platform for studying the quantum anomalous Hall effect, axion insulator states, and the topological magnetoelectric effect.
AB - Heterostructures having both magnetism and topology are promising materials for the realization of exotic topological quantum states while challenging in synthesis and engineering. Here, we report natural magnetic van der Waals heterostructures of (MnBi2Te4)m(Bi2Te3)n that exhibit controllable magnetic properties while maintaining their topological surface states. The interlayer antiferromagnetic exchange coupling is gradually weakened as the separation of magnetic layers increases, and an anomalous Hall effect that is well coupled with magnetization and shows ferromagnetic hysteresis was observed below 5 K. The obtained homogeneous heterostructure with atomically sharp interface and intrinsic magnetic properties will be an ideal platform for studying the quantum anomalous Hall effect, axion insulator states, and the topological magnetoelectric effect.
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U2 - 10.1126/sciadv.aax9989
DO - 10.1126/sciadv.aax9989
M3 - Article
C2 - 31763457
AN - SCOPUS:85075535221
SN - 2375-2548
VL - 5
JO - Science advances
JF - Science advances
IS - 11
M1 - eaax9989
ER -