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Multiferroics in Two-Dimensional Silica with Li Encapsulation
Chenqiang Hua1, Haiqing Hou1, Wenjin Gao1,2
1Hangzhou International Innovation Institute, Beihang University, Hangzhou 311115, China.
Nano Letters
|April 1, 2026
Summary
Researchers discovered strong coupling between polarization and magnetism in 2D multiferroics (Li@SiO2). This finding opens new possibilities for advanced semiconductor nanodevices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Two-dimensional (2D) multiferroics are highly sought after but experimentally challenging to realize.
- Strong magnetoelectric coupling is crucial for advanced electronic devices.
Purpose of the Study:
- To demonstrate the experimental realization of 2D multiferroics.
- To investigate the coupling between polarization and magnetism in Li-encapsulated 2D silica (Li@SiO2).
Main Methods:
- First-principles calculations were employed to study Li@SiO2.
- Analysis of antiferroelectric (AFE), ferroelectric (FE), and antiferromagnetic (AFM) phases.
Main Results:
- Li@SiO2 exhibits energetically favorable AFE and FE phases with AFM ordering.
- Magnetism originates from polarization, indicating strong magnetoelectric coupling.
- Tunable phases (metallic paraelectric, semiconducting FE/AFE with AFM) achieved via electric field and temperature.
Conclusions:
- Li@SiO2 is a promising material for realizing 2D multiferroics in silicon-based systems.
- This research highlights the potential for nonvolatile nanodevices integrated with semiconductor technology.
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