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Updated: Apr 23, 2026
09:00
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
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Emergent Spin-Momentum Locking Phenomena in Low-Dimensional Perovskites
1Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, United States.
ACS Applied Materials & Interfaces
|April 22, 2026
Summary
Chiral hybrid perovskites exhibit significant spin splitting and emergent spin-momentum locking due to chiral cation substitution. This finding offers a new principle for designing spin textures in low-dimensional chiral materials.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid-State Chemistry
Background:
- Chiral hybrid organic-inorganic pyramidal perovskites are promising for spin-orbit-driven functionalities.
- Understanding spin textures in these materials is crucial for spintronic applications.
Purpose of the Study:
- To investigate the effects of chiral cation substitution on the electronic and spin properties of quasi-one-dimensional Pb-Br pyramidal perovskites.
- To elucidate the mechanism behind emergent spin-momentum locking in these chiral systems.
Main Methods:
- First-principles calculations were employed to model the electronic band structure.
- Analysis of spin splitting and spin-momentum locking near the band edges was performed.
Main Results:
- Chiral cation substitution induced substantial spin splitting (up to ~170 meV).
- An emergent one-dimensional (1D) spin-momentum locking was observed near the band edges.
- A single dominant spin-orbit coupling channel was self-selected due to a symmetry-dimensionality mismatch.
Conclusions:
- The study reveals an emergent, non-symmetry-enforced mechanism for spin-momentum locking in low-dimensional chiral solids.
- This emergent mechanism provides a transferable principle for engineering spin textures in chiral materials.
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