@article{0c572840bd9b4489a5feb9ff7a267c0c,
title = "Van der Waals Superstructure and Twisting in Self-Intercalated Magnet with near Room-Temperature Perpendicular Ferromagnetism",
abstract = "The emergence of van der Waals (vdW) magnets has created unprecedented opportunities to manipulate magnetism for advanced spintronics based upon all-vdW heterostructures. Among various vdW magnets, Cr1+δTe2 possesses high temperature ferromagnetism along with possible topological spin textures. As this system can support self-intercalation in the vdW gap, it is crucial to precisely pinpoint the exact intercalation to understand the intrinsic magnetism of the system. Here, we developed an iterative method to determine the self-intercalated structures and show evidence of vdW {"}superstructures{"}in individual Cr1+δTe2 nanoplates exhibiting magnetic behaviors distinct from bulk chromium tellurides. Among 26,332 possible configurations, we unambiguously identified the Cr-intercalated structure as 3-fold symmetry broken Cr1.5Te2 segmented by vdW gaps. Moreover, a twisted Cr-intercalated layered structure is observed. The spontaneous formation of twisted vdW {"}superstructures{"}not only provides insight into the diverse magnetic properties of intercalated vdW magnets but may also add complementary building blocks to vdW-based spintronics.",
author = "Coughlin, {Amanda L.} and Dongyue Xie and Xun Zhan and Yue Yao and Liangzi Deng and Heshan Hewa-Walpitage and Trevor Bontke and Chu, {Ching Wu} and Yan Li and Jian Wang and Fertig, {Herbert A.} and Shixiong Zhang",
note = "Funding Information: We acknowledge support from the U.S. National Science foundation through Grants ECCS-1936406 and DMR-1914451. Further support was supplied by the U.S.-Israel Binational Science Foundation Grant 2016130. H.A.F. acknowledges the support of the Research Corporation for Science Advancement through a Cottrell SEED Award. The electron microscopy studies performed in the Nebraska Center for Materials and Nanoscience was supported by the National Science Foundation under Award ECCS: 1542182 and the Nebraska Research Initiative. Atomistic simulations were completed utilizing the Holland Computing Center of the University of Nebraska, which receives support from the Nebraska Research Initiative. The work performed at the Texas Center of Superconductivity at the University of Houston is supported by U.S. Air Force Office of Scientific Research Grants FA9550-15-1-0236 and FA9550-20-1-0068, the T. L. L. Temple Foundation, the John J. and Rebecca Moores Endowment, and the State of Texas through the Texas Center for Superconductivity at the University of Houston. We thank the Indiana University-Bloomington Electron Microscopy Center for access to transmission electron microscope and Nanoscale Characterization Facility for access to atomic force microscope. Publisher Copyright: {\textcopyright} ",
year = "2021",
month = nov,
day = "24",
doi = "10.1021/acs.nanolett.1c02940",
language = "English",
volume = "21",
pages = "9517--9525",
journal = "Nano letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "22",
}