@article{335695f54ed34769bd657ff1e37d2248,
title = "Topological Hall Effect in a Topological Insulator Interfaced with a Magnetic Insulator",
abstract = "A topological insulator (TI) interfaced with a magnetic insulator (MI) may host an anomalous Hall effect (AHE), a quantum AHE, and a topological Hall effect (THE). Recent studies, however, suggest that coexisting magnetic phases in TI/MI heterostructures may result in an AHE-associated response that resembles a THE but in fact is not. This Letter reports a genuine THE in a TI/MI structure that has only one magnetic phase. The structure shows a THE in the temperature range of T = 2-3 K and an AHE at T = 80-300 K. Over T = 3-80 K, the two effects coexist but show opposite temperature dependencies. Control measurements, calculations, and simulations together suggest that the observed THE originates from skyrmions, rather than the coexistence of two AHE responses. The skyrmions are formed due to a Dzyaloshinskii-Moriya interaction (DMI) at the interface; the DMI strength estimated is substantially higher than that in heavy metal-based systems.",
author = "Peng Li and Jinjun Ding and Zhang, {Steven S.L.} and James Kally and Timothy Pillsbury and Heinonen, {Olle G.} and Gaurab Rimal and Chong Bi and August Demann and Field, {Stuart B.} and Weigang Wang and Jinke Tang and Jiang, {Jidong Samuel} and Axel Hoffmann and Nitin Samarth and Mingzhong Wu",
note = "Funding Information: This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences (DE-SC0018994). The fabrication and characterization of the samples were supported by the U.S. National Science Foundation (EFMA-1641989; ECCS-1915849). Instrumentation supported by the National Science Foundation MRI program (DMR-1727044) was used for this work. Work at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Division of Materials Sciences and Engineering. Work at CWRU was supported by the College of Arts and Sciences at CWRU. Work at PSU was supported by the Penn State Two-Dimensional Crystal Consortium-Materials Innovation Platform (2DCC-MIP) under the U.S. National Science Foundation Grant DMR-1539916. Work at UW was supported by the U.S. National Science Foundation (DMR-1710512) and the U.S. Department of Energy, Office of Science, Basic Energy Sciences (DE-SC0020074). Work at UA is supported by the U.S. National Science Foundation (ECCS-1554011). The authors acknowledge Dr. Vijaysankar Kalappattil and Mr. Yuejie Zhang for helping with transport measurements and Mr. Laith Alahmed for helping with data analyses. Publisher Copyright: {\textcopyright} 2020 American Chemical Society.",
year = "2021",
month = jan,
day = "13",
doi = "10.1021/acs.nanolett.0c03195",
language = "English (US)",
volume = "21",
pages = "84--90",
journal = "Nano letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "1",
}