Highly Efficient Spin-Filtering Transport in Chiral Hybrid Copper Halides
Ying Lu1, Qian Wang2, Ruilin He3
1Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
Angewandte Chemie (International Ed. in English)
|August 23, 2021
Summary
Researchers developed eco-friendly chiral copper halides for spintronics. These materials demonstrate high spin polarization efficiency, offering a stable, lead-free alternative for advanced spin filtering applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Organic Chemistry
Background:
- Chiral hybrid organic-inorganic perovskites show promise for chiral-induced spin selectivity (CISS).
- There is a need for stable, non-toxic, lead-free materials for spintronic applications like spin filtering.
- Existing materials often contain toxic elements like lead, limiting their practical use.
Purpose of the Study:
- To synthesize and investigate novel chiral hybrid copper halides for CISS applications.
- To explore the potential of copper-based materials as stable and eco-friendly alternatives to lead-based perovskites.
- To evaluate the spin-polarized charge transport properties of these new materials.
Main Methods:
- Synthesis of chiral hybrid copper halides (R/S-MBA)₂CuX₄ (X=Cl, Br).
- Characterization of structural and electronic properties.
- Magnetic force microscopy measurements to assess spin-polarized charge transport.
Main Results:
- Successfully synthesized air-stable, low-toxicity chiral hybrid copper halides with 0D CuX₄ tetrahedral motifs.
- Observed efficient spin-polarized charge transport with up to 90% efficiency in both chloride and bromide compounds.
- Identified that (R/S-MBA)₂CuBr₄ exhibits lower chiroptical activity compared to its chloride counterpart despite similar structures.
Conclusions:
- Chiral hybrid copper halides expand the scope of the CISS effect into stable, eco-friendly metal-organic halide systems.
- These materials show significant potential for spintronic applications utilizing transition-metal hybrid systems.
- The findings pave the way for developing next-generation spintronic devices with enhanced safety and stability.
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