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Magnetizing topological surface states of Bi 2 Se 3 with a CrI 3 monolayer

Journal Article · · Science Advances
 [1];  [2];  [3]
  1. Univ. of California, Irvine, CA (United States); DOE/OSTI
  2. Univ. of California, Irvine, CA (United States); Incheon National University, Incheon (Korea)
  3. Univ. of California, Irvine, CA (United States)
To magnetize surfaces of topological insulators without damaging their topological feature is a crucial step for the realization of the quantum anomalous Hall effect (QAHE) and remains as a challenging task. Through density functional calculations, we found that adsorption of a semiconducting two-dimensional van der Waals (2D-vdW) ferromagnetic CrI3monolayer can create a sizable spin splitting at the Dirac point of the topological surface states of Bi2Se3films. Furthermore, general rules that connect different quantum and topological parameters are established through model analyses. This work provides a useful guideline for the realization of QAHE at high temperatures in heterostructures of 2D-vdW magnetic monolayers and topological insulators.
Research Organization:
Univ. of California, Irvine, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
FG02-05ER46237
OSTI ID:
1609695
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 5 Vol. 5; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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