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Full-zone persistent spin textures with giant spin splitting in two-dimensional group IV-V compounds.
Moh Adhib Ulil Absor1, Arif Lukmantoro1, Iman Santoso1
1Department of Physics, Universitas Gadjah Mada, Sekip Utara BLS 21, Yogyakarta 55281, Indonesia.
Researchers discovered full-zone persistent spin texture (FZPST) in novel 2D materials, enabling stable spin polarization across the entire Brillouin zone for advanced spintronics.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Persistent spin texture (PST) is crucial for long carrier spin lifetimes via the persistent spin helix (PSH) mechanism.
- Existing PST is often localized, limiting the stability of PSH states.
Purpose of the Study:
- To report the emergence of full-zone PST (FZPST) in two-dimensional group IV-VA2B2 compounds.
- To investigate the underlying symmetry and properties of FZPST.
Main Methods:
- Symmetry analysis.
- First-principles calculations.
- k.p theory analysis.
Main Results:
- Emergence of FZPST in the entire first Brillouin zone (FBZ) of 2D IV-VA2B2 materials.
- Observation of fully out-of-plane spin polarization due to in-plane mirror symmetry.
- Giant spin splitting sustaining PST with large spin-orbit coupling and small PSH wavelengths.
Conclusions:
- FZPST is robust for non-degenerate bands and controllable by external electric fields.
- These 2D materials offer a promising platform for future spintronic applications.
- The findings pave the way for novel spintronic devices.
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