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Stacking-Dependent Magnetism in Bilayer CrI3
Nikhil Sivadas1, Satoshi Okamoto2, Xiaodong Xu3,4
1School of Applied and Engineering Physics , Cornell University , Ithaca , New York 14853 , United States.
Nano Letters
|November 10, 2018
Summary
The stacking order of bilayer chromium triiodide (CrI3) dictates its magnetic properties, allowing tuning between antiferromagnetic and ferromagnetic states. This finding aids in understanding 2D magnet heterostructures.
Area of Science:
- Condensed matter physics
- Materials science
- Quantum magnetism
Background:
- Bilayer chromium triiodide (CrI3) is a prominent two-dimensional (2D) magnet.
- Understanding the relationship between structure and magnetism is crucial for designing novel magnetic devices.
Purpose of the Study:
- To investigate the influence of stacking order on the magnetic properties of bilayer CrI3.
- To explore methods for experimentally verifying stacking-dependent magnetism.
Main Methods:
- Utilizing first-principles calculations to model bilayer CrI3.
- Analyzing the interlayer exchange interaction as a function of stacking configuration.
Main Results:
- The stacking order is identified as the primary determinant of the magnetic ground state in bilayer CrI3.
- Tuning the interlayer stacking order allows control over the magnetic interaction, switching between antiferromagnetic and ferromagnetic states.
- The linear magnetoelectric effect is proposed as a viable experimental technique to measure the predicted stacking-dependent magnetism.
Conclusions:
- The stacking order critically influences the magnetic ground state of bilayer CrI3.
- This work provides a theoretical explanation for the observed antiferromagnetism in bilayer CrI3.
- The findings have significant implications for the development of heterostructures based on 2D magnets.
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