Topological Hall Effect in Traditional Ferromagnet Embedded with Black-Phosphorus-Like Bismuth Nanosheets
KAUST DepartmentPhysical Science and Engineering (PSE) Division
Material Science and Engineering Program
KAUST Grant NumberCRF-2015-2549-CRG4
Online Publication Date2020-04-27
Print Publication Date2020-06-03
Embargo End Date2021-04-27
Permanent link to this recordhttp://hdl.handle.net/10754/662717
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AbstractTopological Hall effect is an abnormal Hall response arising from the scalar spin chirality of chiral magnetic textures. Up to now, such an effect is only observed in certain special materials, but rarely in traditional ferromagnets. In this work, we have implemented the molecular beam epitaxy technique to successfully embed black-phosphorus-like bismuth nanosheets with strong spin orbit coupling into the bulk of chromium telluride Cr2Te3, as evidenced by atomically resolved energy dispersive X-ray spectroscopy mapping. Distinctive from pristine Cr2Te3, these Bi-embedded Cr2Te3 epitaxial films exhibit not only pronounced topological Hall effects, but also magnetoresistivity anomalies and differential magnetic susceptibility plateaus. All these experimental features point to the possible emergence of magnetic skyrmions in Bi-embedded Cr2Te3, which is further supported by our numerical simulations with all input parameters obtained from the first-principle calculations. Therefore, our work demonstrates a new efficient way to induce skyrmions in ferromagnets, as well as the topological Hall effect by embedding nanosheets with strong spin-orbit couplings.
CitationZhou, L., Chen, J., Chen, X., Xi, B., Qiu, Y., Zhang, J., … He, H. (2020). Topological Hall Effect in Traditional Ferromagnet Embedded with Black-Phosphorus-Like Bismuth Nanosheets. ACS Applied Materials & Interfaces. doi:10.1021/acsami.0c04447
SponsorsThis work was supported by the National Natural Science Foundation of China (No. 11574129, 11774143, 61734008, 51404293 and 11374135, 11774300), the National Key Research and Development Program of China (No. 2016YFA0301703), the Natural Science Foundation of Guangdong Province (No. 2015A030313840, and 2017A030313033), the State Key Laboratory of Low-Dimensional Quantum Physics (No. KF201602), Technology and Innovation Commission of Shenzhen Municipality (No. JCYJ20160531190254691, JCYJ20160531190535310, KQJSCX20170727090712763, ZDSYS201703031659262, and JCYJ20170412152334605). J.W.M was partially supported by the program for Guangdong Introducing Innovative and Entrepreneurial Teams (No. 2017ZT07C062). J. Zhang and X. Zhang were supported by King Abdullah University of Science and Technology (KAUST), Office of Sponsored Research (OSR) under Award No: CRF-2015-2549-CRG4.
PublisherAmerican Chemical Society (ACS)