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Updated: Jan 7, 2026
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Fabricating van der Waals Heterostructures with Precise Rotational Alignment
Published on: July 5, 2019
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Proximity-Driven Non-Volatile Spin and Valley Control in a Van Der Waals Antiferromagnetic Heterostructure
Lili Hu1, Shan Dong2, Yuxin Zhai3
1Beijing Academy of Quantum Information Sciences, Beijing, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|December 27, 2025
Summary
Researchers achieved non-volatile spin and valley control in 2D quantum systems using a CrPS4/MoSe2 heterostructure. This breakthrough enables persistent spin and valley polarizations for spintronic and valleytronic applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Technologies
Background:
- Integrating non-volatile spin and valley control in 2D quantum systems is crucial for spintronics and valleytronics.
- Challenges exist in achieving persistent control without external stimuli.
Purpose of the Study:
- To demonstrate persistent spin and valley polarizations in a van der Waals heterostructure.
- To explore the use of interfacial magnetic proximity effects for quantum functionalities.
Main Methods:
- Fabrication of a van der Waals heterostructure using bulk antiferromagnetic CrPS4 and monolayer MoSe2.
- Investigation of chiral photoluminescence (PL) hysteresis linked to antiferromagnetic ordering.
- Analysis of spin-polarized charge transfer and valley degeneracy breaking.
Main Results:
- Demonstrated persistent spin and valley polarizations in the 1L-MoSe2/bulk-CrPS4 heterostructure.
- Observed non-volatile chiral PL hysteresis tied to the CrPS4 antiferromagnetic order.
- Achieved a low magnetic field (∼0.5 T) for PL helicity switching, significantly lower than bulk CrPS4.
Conclusions:
- The CrPS4/MoSe2 heterostructure provides a robust platform for non-volatile quantum devices.
- This system enables low-energy, magnetically tunable spintronic and valleytronic functionalities.
- Bridged the gap between transient valleytronic phenomena and practical non-volatile applications.
Keywords:
2D magnetic materialsanti‐ferromagnetic materials (AFM)photoluminescence spectroscopyproximity effectraman spectroscopyMore Related Videos
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